The MSI G32C4X 32″ Monitor delivers ultra-smooth and immersive visuals for gaming and entertainment.It features a 32-inch Full HD curved display that enhances immersion and provides a wide field of view. Moreover, its 250Hz refresh rate ensures extremely smooth motion during fast-paced games. This monitor uses a VA panel for strong contrast and deep colors. Additionally, the fast response time reduces blur and ghosting for competitive gaming. The anti-glare screen helps minimize reflections in bright rooms. HDMI and DisplayPort inputs allow easy connection to gaming PCs and consoles. Furthermore, the curved design and tilt adjustment help you maintain a comfortable viewing angle during long sessions. Low blue light and flicker-free technologies reduce eye strain during extended use. This display is ideal for gamers, esports enthusiasts, and home users alike. Therefore, it supports competitive gaming, streaming, and everyday computing. Finally, it combines fast performance, immersive visuals, and comfort features for daily use. Specifications: Display : 31.5″ VA Resolution : 1920 x 1080 (FHD) Refresh Rate : 250Hz Response Rate : 1ms Curvature : 1500R
Premium bilingual keyboard replacement for MacBook Pro 13″ (A1278, 2009–2012) — choose US/Arabic or UK/Arabic layout. Features durable scissor-switch keys, OEM fit, and clear dual-language legends for seamless typing in English and Arabic. Compatible With: MacBook Pro 13-inch (Model A1278) from Late 2009, Mid 2010, Early 2011, and Mid 2012 (Model Identifiers: MacBookPro5,5, 6,2, 8,1) Layout Options (select at purchase): US/Arabic: Primary legends in Arabic, secondary (top-left) in US QWERTY — includes @, #, and standard US symbols. UK/Arabic: Primary legends in Arabic, secondary in UK QWERTY — includes £ symbol, taller Enter key, and UK-specific punctuation. Both versions feature full Arabic character set US/Arabic: Primary legends in Arabic, secondary (top-left) in US QWERTY — includes @, #, and standard US symbols. UK/Arabic: Primary legends in Arabic, secondary in UK QWERTY — includes £ symbol, taller Enter key, and UK-specific punctuation. Both versions feature full Arabic character set Keyboard Type: Traditional scissor-switch mechanism—reliable, tactile, and serviceable (pre-Butterfly design). Backlighting: Included on Early 2011 and Mid 2012 models only. Keycaps are translucent for even lighting. (Note: Late 2009 & Mid 2010 A1278 models did not support backlighting—keyboard will still function, but lighting requires compatible hardware.) Build & Fit: Precision-molded frame with correct screw mounts and alignment pegs—ensures flush, secure installation in the original top case with no rattling. Installation: Keyboard is screw-mounted (no adhesive)—one of the most DIY-friendly MacBook keyboards. Requires top case access and battery disconnect. Suitable for intermediate users or professionals.
Apple USB-C to Lightning Cable (1m) - With Apple Warranty Apple USB-C to Lightning Cable (1m) – With Apple Warranty Connect your iPhone, iPad or iPod with Lightning connector to your USB-C– or Thunderbolt 3 (USB-C)–enabled Mac for syncing and charging, or to your USB-C–enabled iPad for charging. You can also use this cable with your Apple 18W, 20W, 29W, 30W, 61W, 87W or 96W USB‑C Power Adapter to charge your iOS device and even take advantage of the fast-charging feature on selected iPhone and iPad models.
Sklon Ski Boot Bag – Expandable 55–65 L backpack with waterproof fabric, separate boot space, and padded carry system.Ideal for skiing and snowboarding gear transport with hands-free comfort and smart compartment layout. Model: Sklon10 Ski Boot Bag Backpack Capacity: 55 L (expandable to 65 L via integrated zipper) Dimensions: Approx. 34.9 cm × 30.5 cm × 53.3 cm (13.75″ × 12″ × 21″) Weight: Around 1.9 kg Material: Water-resistant polyester and nylon soft-shell build Compartments: Dedicated boot section to isolate wet gear Helmet and goggle compartments Multiple internal and external zippered pockets Compartments: Dedicated boot section to isolate wet gear Helmet and goggle compartments Multiple internal and external zippered pockets External Features: Adjustable straps to carry skis or snowboard Compact foldable design for storage External Features: Adjustable straps to carry skis or snowboard Compact foldable design for storage Comfort: Ergonomic padded shoulder straps Cushioned back panel Top and side grab handles Comfort: Ergonomic padded shoulder straps Cushioned back panel Top and side grab handles Use Case: Designed for skiing, snowboarding, or as a multi-use travel pack
Are you in search of a high-performance gaming monitor? Look no further! The MSI MPG 274URF QD 27″ 160Hz gaming monitor is here to elevate your gaming experience. This monitor combines cutting-edge technology with sleek design to provide an unbeatable gaming setup. Firstly, let’s talk about the impressive display. The 27-inch screen size offers ample viewing space, making every detail pop. The Quantum Dot technology ensures vibrant and accurate colors, enhancing the overall visual experience. In addition, the 160Hz refresh rate is a game-changer. It ensures smooth and fluid motion, reducing blur and lag. This is essential for fast-paced games where every millisecond counts. With the MSI MPG 274URF QD, you can stay ahead of the competition. Moreover, the 1ms response time minimizes input lag. This allows for quick reactions and precise movements, crucial for competitive gaming. Every action you take will be instantaneously reflected on the screen, providing a seamless gaming experience. Furthermore, this gaming monitor supports HDR, delivering stunning contrast and brightness. You will enjoy deeper blacks and brighter whites, bringing your games to life. The detailed shadows and highlights will immerse you in the game world like never before. Comfort is also a key feature of the MSI MPG 274URF QD. The ergonomic design allows you to adjust the height, tilt, and swivel to find the perfect viewing angle. This ensures you can game comfortably for hours without straining your neck or eyes. Additionally, the monitor comes with multiple connectivity options. Easily connect your PC, console, or other devices with the available HDMI, DisplayPort, and USB ports. This versatility makes it a great addition to any gaming setup. In conclusion, the MSI MPG 274URF QD 27″ 160Hz gaming monitor offers superior performance and stunning visuals. Whether you’re a casual gamer or a professional, this monitor will enhance your gaming experience. Upgrade your setup today and enjoy the best in gaming technology! Specifications: Display : 27″ Rapid IPS Resolution : 3840×2160 (UHD) Refresh Rate : 160Hz Response Rate : 0.5ms
Are you ready to take your gaming to the next level? Dive into the realm of ViewSonic VX2758A-2K-PRO-2 gaming monitors, where affordability meets exceptional performance for an unmatched gaming experience. Firstly, enjoy crystal-clear visuals with ViewSonic’s high-resolution displays. Immerse yourself in the action with vibrant colors and sharp images, providing a gaming experience like never before. Transition smoothly between scenes with ViewSonic’s quick response times. Say goodbye to lag and motion blur, ensuring you stay ahead in the game and never miss a critical moment. Explore a range of sizes to suit your gaming setup. From compact options for cozy spaces to larger displays for a cinematic experience, ViewSonic has a gaming monitor to fit your preferences. Achieve optimal comfort with customizable settings. ViewSonic VX2758A-2K-PRO-2 gaming monitors offer adjustable brightness, contrast, and color settings, allowing you to tailor the display to your liking and reduce eye strain during extended gaming sessions. In conclusion, elevate your gaming setup without breaking the bank. ViewSonic VX2758A-2K-PRO-2 gaming monitors provide the perfect blend of affordability and top-notch performance, delivering a visually stunning and responsive gaming journey. Level up your gaming experience with ViewSonic today! Specifications: Resolution : 2K QHD Display : 27″ IPS Refresh Rate : 170Hz Response Time : 1ms
The AOC Q27G3Z is a high-end 27″ gaming monitor with a QHD resolution of 2560×1440. It uses a Fast IPS panel that delivers excellent color and speed. In addition, it supports a refresh rate of 240 Hz and a response time of 0.5 ms (MPRT) for ultra-smooth gameplay. Its adaptive sync support ensures tear-free visuals during fast action. The AOC Q27G3Z covers wide color gamuts: NTSC 110 %, sRGB 123 %, and DCI-P3 101 %. This makes it ideal not only for gaming but also for content creation. Moreover, it is VESA DisplayHDR 400 certified, so highlights pop and blacks look deeper. The brightness reaches around 400 cd/m², making it suitable in well-lit rooms. Connectivity includes two HDMI 2.0 ports and two DisplayPort 1.4 inputs for flexibility across consoles and PCs. Additionally, the ergonomic stand allows height adjustment, tilt, swivel, and pivot for comfortable viewing in any setup. Its sleek black & red design blends into gaming rigs easily. In short, the AOC Q27G3Z combines speed, clarity and color accuracy in one package. It is a great choice for competitive gamers and creators who want a balanced monitor that handles both performance and visuals well. Check out other option here! Specifications: Display : 27″ Fast IPS Resolution : 2560 x 1440 (QHD) Refresh Rate : 240Hz Response Rate : 0.5ms
HUAWEI IdeaHub B2 IHB2-86PU 86-inch conferencing display delivers clear 4K visuals for meetings and collaboration. It allows teams to share ideas effectively and work interactively. As a result, conferences become more productive and engaging. The display features zero-gap laminated glass and D-LED/IPS technology. Therefore, it offers sharp images and reduced glare. The 60Hz panel ensures smooth visuals during presentations. It supports up to 20 touch points with infrared multi-touch. In addition, smart handwriting recognition and annotation enable natural note-taking. Low latency writing ensures precise input with the magnetic stylus pens. The system includes a quad-core CPU, 4GB RAM, and 32GB storage. Consequently, it runs applications smoothly. It supports Android, Windows, iOS, and macOS for versatile use. It also includes key capabilities such as 4K UHD resolution, multi-touch interaction, smart annotation, dual Wi-Fi connectivity, and enhanced audio. HUAWEI IdeaHub B2 IHB2-86PU is designed to improve collaboration in professional environments. Specifications: 86-inch 4K UHD display with 3840 × 2160 resolution Supports up to 20 touch points with infrared multi-touch Zero-gap laminated glass with D-LED/IPS panel Low latency writing with smart annotation and magnetic pens Quad-core CPU with 4GB RAM, 32GB storage, and dual Wi-Fi
The MSI PRO MP273 27″ FHD Monitor delivers a clear viewing experience with a 27-inch Full HD display. It suits office work and daily tasks well. Moreover, the IPS panel provides consistent colors and wide viewing angles. This helps maintain image quality from different positions. The 75Hz refresh rate ensures smoother visuals during browsing and video playback. A 5ms response time keeps motion clear and stable. It includes HDMI and DisplayPort inputs for flexible connectivity. You can easily connect multiple devices when needed. Additionally, built-in speakers support basic audio use without external devices. The anti-glare screen improves comfort during long sessions. You can also mount it using VESA support to save desk space. The MSI PRO MP273 27″ FHD Monitor offers reliable performance for everyday use. Specifications: 27-inch Full HD (1920 × 1080) IPS display 75Hz refresh rate for smoother visuals 5ms response time (GTG) HDMI and DisplayPort connectivity Built-in speakers with anti-glare screen
The LG 34U530A-W 34″ WFHD IPS 100Hz Monitor delivers wide and immersive visuals that enhance work, entertainment, and gaming experiences. Its 34-inch ultra-wide display provides a larger view area that helps with multitasking, productivity, and movie watching. Moreover, the WFHD resolution ensures clear and detailed images so you can see content with accuracy and sharpness. This monitor features an IPS panel that offers wide viewing angles and consistent color performance, making it suitable for creative work, office tasks, and everyday use. Additionally, the 100Hz refresh rate delivers smoother motion during gaming and video playback compared to standard displays. The sleek white design fits easily into modern home and office setups without taking up too much space. The LG 34U530A-W includes multiple connectivity options that allow you to connect laptops, desktops, and other devices with ease. Furthermore, its ergonomic tilt adjustment helps maintain comfortable viewing during long sessions. Therefore, it is ideal for home users, students, professionals, and gamers who want a versatile monitor. Finally, it combines immersive wide visuals, smooth performance, and user-friendly design for everyday use. Specifications: 34″ ultra-wide WFHD monitor IPS panel with wide viewing angles 100Hz refresh rate for smoother motion Sleek design with versatile connectivity Comfortable for work, entertainment, and gaming
A1618 Replacement Battery for MacBook Pro 15 Inch Retina A1398 (Early 2015), Laptop A1494 A1618 Replacement Battery Capacity: 8440mAh/95.03Wh 11.26V, Battery Type: Li-Polymer 【Package include: 1pcs – OEM laptop replacement battery for macbook air 13 inch, 2pcs – screwdrivers, 1pcs – Professional installation instructions】 【Operating life and certification】UL-/CE-/FCC-/RoHS-Certified/PSE Report for safety. Cobalt Proportion: >98%. Upgrade chip — Up to 1500+ recharge cycles over the life of the battery, Long operating time after charging full with 8440mAh real high capacity, same with original battery A1494/A1618 【Premium Electric Core】Japan Newest 4.0 upgraded OEM Battery for macbook pro 15 Inch A1398 (Late 2013, Mid 2014, Early 2015). Better circuit board, multiple command chip control, keep the battery stable charge and discharge.Over charger and discharger (short-circuit) protection, ensure fast charges and low power consumption 【Compatibility】 MacBook pro 15” Retina A1398 (Late 2013, Mid 2014, Early 2015) ME293 ME294 MGXA2 MGXC2 MJLQ2 MJLT2 MJLU2. Please check the picture to get more detail
The MSI MAG 274QRFW X32 is a 27-inch gaming monitor designed for fast-paced gaming. It features a 320Hz refresh rate, providing ultra-smooth motion for competitive play. Furthermore, its high-quality panel delivers vibrant colors and clear visuals for immersive gameplay. The monitor supports a 1ms response time, reducing motion blur and ghosting. In addition, adaptive sync technology ensures smooth performance without screen tearing. Gamers can enjoy both fast reactions and detailed graphics during intense sessions. It includes multiple connectivity options such as DisplayPort and HDMI, allowing easy connection to PCs and consoles. Moreover, ergonomic adjustments let users tilt, swivel, and adjust height for comfortable long gaming sessions. As a result, the MSI MAG 274QRFW X32 enhances both performance and comfort. This monitor combines speed, visual clarity, and ergonomic design, making it ideal for competitive and casual gamers alike. Specifications: 27-inch display with 320Hz refresh rate 1ms response time for reduced motion blur Vibrant panel with clear and immersive visuals Adaptive sync for smooth performance without tearing Multiple connectivity options and ergonomic adjustments
The Samsung 55″ Neo QLED QN70F 4K Vision AI Smart TV QA55QN70FAUXTW delivers a premium viewing experience with advanced Neo QLED technology. It produces bright, sharp, and detailed images with strong contrast, so movies, sports, and games look clear and immersive on the 55-inch screen. Neo QLED technology uses Quantum Mini LEDs to improve brightness control and contrast accuracy. As a result, dark scenes appear deeper while bright scenes stay vivid and balanced. This creates a more realistic picture across different types of content. Vision AI enhances picture and sound in real time. It analyzes each scene and automatically adjusts brightness, sharpness, and color. Therefore, the TV consistently delivers optimized visuals without manual settings. In addition, AI upscaling improves lower-resolution content closer to 4K quality for better clarity and detail. HDR support expands brightness range and color depth, making visuals more dynamic and lifelike. Fast motion handling also improves clarity, which enhances sports and action viewing. The Smart TV platform provides easy access to streaming apps, gaming features, and smart home controls. It runs smoothly and responds quickly when switching between apps. In addition, the slim design with thin bezels gives the Samsung 55 Neo QLED QN70F 4K Vision AI Smart TV QA55QN70FAUXTW a modern and premium appearance. Overall, this Samsung Neo QLED TV combines strong brightness performance, AI optimization, and smart connectivity for a powerful entertainment experience. Specifications: Neo QLED technology delivers bright, sharp, and detailed picture quality 55-inch 4K display provides immersive viewing experience Vision AI enhances picture and sound automatically in real time HDR improves contrast, brightness, and color depth Smart TV platform supports apps, streaming, and smart features
The Samsung 43-Inch Full HD Smart TV UA43F6000FUXTW uses a 43-inch LCD panel with 1920 × 1080 resolution. It delivers standard Full HD picture quality for everyday TV viewing, streaming, and basic entertainment use. The display supports Full HD resolution, which shows clear and detailed images for HD content. In addition, Samsung picture processing improves lower-resolution sources to reduce noise and enhance clarity on the screen. The TV runs a native 60 Hz refresh rate. Also, motion processing helps reduce blur in fast-moving scenes such as sports and action content. Samsung equips this model with a Smart TV platform based on Tizen OS. Therefore, users can access streaming apps, online content, and basic smart features through a simple interface. Connectivity includes HDMI ports, USB ports, Wi-Fi, Bluetooth, Ethernet LAN, and optical audio output. In addition, the TV supports external devices such as game consoles, set-top boxes, and sound systems. This model focuses on Full HD resolution, essential smart TV functions, and basic connectivity without 4K resolution or advanced display processing features. Specifications: 43-inch LCD panel with 1920 × 1080 Full HD resolution 60 Hz native refresh rate display Tizen OS smart platform with streaming apps HDMI, USB, Wi-Fi, Bluetooth, Ethernet connectivity Supports external devices like consoles and media players
HP SPro 322pe Monitor Overview The HP SPro 322pe is a professional Full HD monitor built for daily business use. It delivers reliable performance and a clean design. As a result, it fits perfectly in offices and work-from-home setups. 21.5-Inch Full HD Display This monitor features a 21.5-inch Full HD resolution. Therefore, text appears sharp and easy to read. Moreover, images look clear and balanced. Because of this, it supports productivity tasks with ease. In addition, the compact size saves desk space. As a result, it works well in smaller work areas. Smooth and Stable Visual Experience The HP SPro 322pe offers smooth and stable visuals. Therefore, everyday tasks feel comfortable. In addition, scrolling and browsing look natural. This makes it suitable for long working hours. Eye Comfort for Long Sessions This monitor includes eye comfort features. As a result, it helps reduce eye fatigue. Moreover, the anti-glare screen improves visibility. Therefore, users stay focused throughout the day. Connectivity and Ease of Use The HP SPro 322pe includes essential connectivity options. As a result, it connects easily to most PCs. Moreover, setup is quick and straightforward. This saves time and effort. Professional Design and Flexibility The monitor features a simple and professional design. In addition, it supports VESA mounting. As a result, users can customize their workspace layout. Ideal for Office and Business Use This monitor focuses on efficiency and reliability. Moreover, it supports daily workloads without distraction. In conclusion, it is a solid choice for professional environments. Specifications: Display : 21.45″ VA Resolution : FHD (1920 X 1080) Connectivity: 1x HDMI 1.4, 1x VGA. Performance: 100Hz refresh rate for smooth motion, 5ms GtG response time.
BenQ MOBIUZ EX251 25” FHD 220Hz Gaming Monitor is a high-refresh-rate gaming display designed for smooth gameplay, fast response, and clear Full HD visuals. It targets competitive gamers who need speed and low input delay. The monitor uses a 25-inch IPS panel with a 1920 × 1080 resolution. Therefore, it delivers sharp images and wide viewing angles for gaming and everyday use. In addition, it supports a 220Hz refresh rate and 1ms GTG response time for very smooth motion. Moreover, it includes AMD FreeSync support. As a result, it reduces screen tearing and stuttering during fast gameplay. In addition, it improves visual stability in FPS and action games. The EX251 also uses BenQ MOBIUZ color tuning features. Therefore, it enhances game visuals with adjusted contrast and color profiles for better detail visibility. In addition, it includes eye-care technologies that reduce flicker and blue light for longer gaming comfort. Furthermore, it supports console and PC gaming at 1080p up to high refresh rates depending on connection type. As a result, it works well with modern gaming setups including PlayStation, Xbox, and gaming PCs. Finally, the BenQ MOBIUZ EX251 delivers fast performance, smooth motion, and comfortable long-session gaming in a compact 25-inch form factor. Specifications: Display: 25-inch IPS panel with 1920 × 1080 Full HD resolution Refresh Rate: Up to 220Hz for ultra-smooth gameplay Response Time: 1ms GTG for fast reaction performance Sync: AMD FreeSync support for tear-free gaming Features: Eye-care technology with low blue light and flicker-free design
WiWU Minimalist Laptop Handbag – Lightweight, water-resistant bag with soft interior padding, shock protection, and dual compartments.Available in 14″ and 15.6″ sizes, perfect for secure and stylish daily laptop carry. Model: WiWU Minimalist Laptop Handbag Material: Water-resistant polyester exterior with a soft faux-fur padded interior Available Sizes: 14″ and 15.6″ versions to accommodate most laptops Protection: Built-in anti-collision padding and 360° all-around corner protection Compartments: Main laptop compartment (soft-lined) Front organizer section with inner pockets for cables, chargers, phone, and accessories Compartments: Main laptop compartment (soft-lined) Front organizer section with inner pockets for cables, chargers, phone, and accessories Carrying Options: Top handles for hand carry Detachable shoulder strap Luggage strap for trolley attachment Carrying Options: Top handles for hand carry Detachable shoulder strap Luggage strap for trolley attachment Design Features: Durable YKK zippers, reinforced corners, slim profile Weight: Approx. 703 g (14″), 884 g (15.6″) Use Case: Ideal for work, study, travel, and everyday protection of devices
Are you seeking a versatile solution for your presentation and collaboration needs? Look no further than the BenQ RE03A 75″ Board Essential. This cutting-edge interactive whiteboard redefines productivity and engagement in meeting rooms and classrooms alike. With its expansive 75-inch display, the BenQ RE03A offers ample space for showcasing your ideas and content. Whether you’re delivering a presentation, brainstorming with colleagues, or teaching a class, this interactive board provides a captivating canvas for your creativity. Transitioning to functionality, the BenQ RE03A boasts intuitive touch controls that make navigation and interaction effortless. Its responsive touch technology ensures smooth and precise input, allowing you to annotate, draw, and manipulate content with ease. Furthermore, the board’s seamless connectivity options enable seamless integration with your existing devices and software. Whether you’re using a laptop, tablet, or smartphone, the BenQ RE03A ensures compatibility and flexibility for all your presentation needs. In addition, collaboration features such as screen sharing and real-time annotation foster teamwork and idea exchange among participants. Break down communication barriers and enhance productivity with the BenQ RE03A’s collaborative tools. Moreover, the board’s durable construction and anti-glare surface ensure reliability and visibility even in brightly lit environments. Say goodbye to distractions and glare, and hello to clear, crisp visuals every time. In conclusion, the BenQ RE03A 75″ Board Essential is a game-changer for presentations and collaboration. With its large display, intuitive controls, and collaborative features, it empowers users to deliver impactful presentations and foster teamwork like never before. Upgrade your meeting room or classroom with the BenQ RE03A and unlock new possibilities for productivity and engagement. Specifications: Screen Size : 75″ Panel Type : IPS Resolution : UHD 3840×2160 Response Time : 8ms
WiWU Vivid Laptop Bag – Durable waterproof case with faux-fur lining and two compartments, available in both 14″ and 15.6″ sizes.Stylish, lightweight, and well-padded—perfect for daily professional or student use. Model: WiWU Vivid Laptop Handbag Material: Water-resistant polyester exterior, soft faux-fur lining interior Sizes: 14″ version: fits up to 14-inch laptops 15.6″ version: fits standard 15.6-inch laptops Sizes: 14″ version: fits up to 14-inch laptops 15.6″ version: fits standard 15.6-inch laptops Protection: Shock-resistant padded compartment, anti-scratch lining Storage: Main laptop compartment Zippered front pocket for charger, cables, mouse, or tablet Storage: Main laptop compartment Zippered front pocket for charger, cables, mouse, or tablet Carrying Options: Comfortable padded handles + optional adjustable shoulder strap Design: Lightweight and slim profile with minimalist look; available in multiple colors Weight: Approx. 365 g (14″), approx. 420 g (15.6″) Use Case: Designed for work, school, commuting, or travel
The MSI Optix AG321CR Monitor delivers immersive gaming with a 31.5″ curved display and Full HD resolution. The 1500R curvature enhances field of view and comfort. Moreover, it features a 165Hz refresh rate and 1ms response time for smooth motion. This improves clarity during fast gameplay. The VA panel provides high contrast and deep blacks. It ensures consistent colors with wide 178° viewing angles. Adaptive Sync with AMD FreeSync Premium reduces screen tearing and stutter. This delivers fluid and stable performance in games. It also includes Night Vision to improve detail in dark scenes. Anti-flicker and low blue light features help reduce eye strain. The MSI Optix AG321CR Monitor is ideal for users who want large curved visuals and smooth gaming performance. Specifications: 31.5″ Full HD VA curved panel with 1500R curvature 165Hz refresh rate for smooth gameplay 1ms (MPRT) response time for reduced motion blur AMD FreeSync Premium for tear-free performance Wide viewing angles with high contrast ratio
