RK ROYAL KLUDGE RK918 Wired Mechanical Keyboard, RGB Backlit Gaming Keyboard with Large LED Surrounding Side Lamp, Full Size 108 Keys Mechanical 100% Anti-Ghosting Computer Keyboard, Red Switch White About this item 【Full Size 108 Keys & Anti Ghosting Mechanical Keyboard】: 100% percent layout 108 key Mechanical keyboard. All keys do not conflict, ensure that every click is registered, and greatly improve the gaming and typing experience. Press FN and F1~F12 keys could quickly activate the multi-function keys, running for what you demand immediately. It is a great choice as a Christmas gift 【RGB Backlit & LED Surrounding Side Lamp】: The RGB backlight keyboard has more than 20 backlight modes, including interactive backlight, breathing backlight modes, dynamic RGB mode, etc. Besides, there are large LED surrounding side lamps. These all will give you more enjoyable when you gaming or typing at night 【Mechanical Red Switches & Double Shot Keycaps】: Offering linear and quiet typing feedback, smooth top-to-bottom actuation travel distance with shallow sound. If you prefer a quiet environment and a small operating force, red switches are the right choice. Double shot keycap type is produced when two layers of plastic are molded into each other. No printing is necessary. The result is a key legend that will never fade or chip off 【Wide Compatibility & Software Support】: Compatible with Windows, Mac, Linus, etc. The wired connection enables stable transmission without worrying about the impact of the signal. Through RK software, you can customize RGB mode and color, redefine key function, customize macros, and set gaming mode 【Professional and Reliable Service】: RK ROYAL KLUDGE has a professional service team. Over the years, we have kept bringing high-quality products and services to customers, so that we have gained the love and trust of many customers. If you have any questions, you can contact us anytime. RK ROYAL KLUDGE will spare no effort to provide every customer with the best service within 24 hours.
In the world of monitors, the Smart Monitor M5 LS32CM501 takes center stage. Packed with intelligent features, this monitor becomes the ideal choice for elevating your productivity and entertainment, offering seamless multitasking, vibrant visuals, and a space-saving design for a modern and efficient workspace. Transitioning to its key features, the Smart Monitor M5 excels in providing a smart and efficient viewing experience. Engineered for seamless multitasking, it ensures a responsive and reliable display, making it an ideal choice for users seeking an intelligent monitor solution. Moreover, this smart monitor impresses with its vibrant and modern design. The Smart Monitor M5 not only enhances your viewing experience but also saves space, making it a reliable and visually appealing choice for a clutter-free workspace. In addition to its functionality, the M5 offers user-friendly controls and customizable features. This guarantees a hassle-free and adaptable monitor experience, allowing you to optimize your workspace effortlessly. Furthermore, the commitment to user satisfaction is evident in the M5’s durable build and compatibility with various devices. It stands as a reliable choice for upgrading your monitor without compromising on performance. In conclusion, the Smart Monitor M5 LS32CM501 redefines monitor solutions, combining intelligence, space-saving design, and top-tier performance. Elevate your workspace effortlessly with the M5 – your gateway to a modern and efficient work environment! Specification Resolution : 1920 x 1080 Aspect Ratio : 16:9 Response Time : 4ms(GTG) Refresh Rate : 60Hz Panel Type : VA Part Number : LS32CM501
TeamGee Portable Monitor for Laptop, 12” Full HD IPS Display, Dual Triple Monitor Screen Extender, HDMI/USB-A/Type-C Plug and Play for Windows, Chrome & Mac, Work with 13”-16” Laptops Brand TeamGee Mounting Type Desk Mount Color Black Hardware Interface USB, USB Type C, HDMI Connectivity Technology USB, HDMI Package Dimensions 14.02 x 10.04 x 3.58 inches Item Weight 5.7 pounds Manufacturer TeamGee ASIN B09NLKWDMP Item model number P2 1 Year Warranty manufacturer link
The LG 32GN600-B 32″ Monitor delivers clear and smooth visuals for gaming and everyday use.It features a 32-inch QHD display with sharp details and vibrant colors. Moreover, its high refresh rate ensures fluid motion in fast-paced games and videos. This monitor uses a VA panel for strong contrast and wide viewing angles. Additionally, the fast response time reduces blur and ghosting during competitive gaming. The anti-glare screen helps minimize reflections in bright environments. HDMI and DisplayPort inputs allow easy connection to PCs, laptops, and gaming consoles. Furthermore, tilt adjustment helps you find a comfortable viewing angle for long sessions. Low blue light and flicker-free technologies reduce eye strain during extended use. This display is ideal for gamers, streamers, and home users alike. Therefore, it supports competitive gaming, media streaming, and productivity tasks. Finally, it combines sharp visuals, fast performance, and comfort features for daily use. Specifications: Screen Size: 32″ QHD VA panel Resolution: 2560 × 1440 Refresh Rate: High for smooth motion Ports: HDMI + DisplayPort Features: Anti-glare, low blue light, flicker-free eye care
The MSI Optix G321CQP Monitor delivers smooth gaming with a 165Hz refresh rate and curved 31.5-inch display. It suits immersive gameplay well. Moreover, the 1000R curved VA panel matches the natural eye shape. This improves comfort and viewing immersion. The WQHD resolution provides sharp and detailed visuals. You get better clarity compared to standard Full HD screens. In addition, the 1ms response time reduces motion blur during fast scenes. This helps maintain clear and responsive gameplay. It also supports AMD FreeSync Premium for smoother visuals. Screen tearing and stuttering are reduced during gaming sessions. Connectivity includes DisplayPort and HDMI inputs for flexibility. You can connect multiple devices with ease. The MSI Optix G321CQP Monitor offers a balanced gaming experience with speed, clarity, and immersion. Specifications: 31.5-inch WQHD (2560 × 1440) curved VA panel 165Hz refresh rate for smooth gameplay 1ms (MPRT) response time AMD FreeSync Premium support DisplayPort and HDMI connectivity
The LG UltraFine 27-Inch 4K UHD IPS Monitor | 27U730A is a professional-grade display designed for content creation, office productivity, and multimedia entertainment. It features a 27-inch UHD 4K (3840 × 2160) IPS panel that delivers sharp image quality, wide viewing angles, and detailed visuals for everyday work and creative projects. The monitor supports DCI-P3 90% color gamut and HDR10, helping deliver accurate colors and improved contrast for photo editing, video production, and content consumption. Therefore, it is well suited for users who require reliable color performance. It includes USB Type-C connectivity with up to 90W Power Delivery, allowing a compatible laptop to receive video, data, and charging through a single cable. In addition, the monitor provides HDMI, DisplayPort, and USB ports for flexible device connectivity. The ergonomic stand supports height, tilt, swivel, and pivot adjustments for improved comfort during long working sessions. Moreover, the three-side virtually borderless design helps create a clean and modern workspace. Built-in speakers further simplify desk setups by reducing the need for external audio devices. As a result, the LG UltraFine 27U730A offers a complete solution for productivity and creative workflows. Specifications: 27-inch UHD 4K (3840 × 2160) IPS display DCI-P3 90% color gamut with HDR10 USB-C with 90W Power Delivery Height, tilt, swivel, and pivot adjustments HDMI, DisplayPort, USB hub, and built-in speakers
The Lenovo ThinkVision T32h-30 31.5″ 60Hz 2K Business Monitor is built for productivity and comfort. It offers a large and clear display that helps you work more efficiently. This monitor is perfect for offices, creators, and home workspaces. With its 31.5-inch 2K resolution, the Lenovo ThinkVision T32h-30 31.5″ 60Hz 2K Business Monitor delivers sharp details and bright colors. Text looks clean and images appear crisp. Therefore, you can enjoy better clarity during long work sessions. The 60Hz refresh rate ensures smooth motion for daily tasks. It is ideal for spreadsheets, browsing, and video meetings. As a result, your workflow feels more stable and comfortable. The Lenovo ThinkVision T32h-30 31.5″ 60Hz 2K Business Monitor features ultra-thin bezels for a modern design. This also makes multi-monitor setups more seamless and visually appealing. Its ergonomic stand allows tilt, swivel, and height adjustments. You can set the perfect viewing angle and reduce strain. Moreover, it uses low blue light technology to protect your eyes during long hours. The monitor includes USB-C, HDMI, and DisplayPort connections. With USB-C, you can charge your laptop and transfer data with one cable. This helps keep your workspace clean and organized. In summary, the Lenovo ThinkVision T32h-30 31.5″ 60Hz 2K Business Monitor offers clarity, comfort, and strong connectivity. It is an excellent choice for professionals who need space, precision, and modern features. Specifications: Display : 31.5″ IPS Resolution : 2K (2560×1440) Refresh Rate : 60Hz Response Time : 4ms GtG
The ViewSonic VA2409-H 24″ FHD 750Hz Monitor delivers clear visuals for daily work and home use. Its Full HD resolution shows sharp text and detailed images. The 24-inch screen offers a perfect balance between size and comfort. This makes it ideal for desks with limited space. Moreover, the ViewSonic VA2409-H 24″ FHD 750Hz Monitor offers an ultra-smooth refresh experience for fast screen motion. Scrolling becomes very smooth and clean. Videos appear fluid with less blur. As a result, motion looks natural and easy on the eyes. In addition, the monitor uses IPS panel technology for wide viewing angles. Colors stay accurate from every direction. This helps during shared screen use and teamwork. The image remains bright and steady at all times. Furthermore, the ViewSonic VA2409-H 24″ FHD 750Hz Monitor includes eye comfort features for daily protection. The low blue light mode helps reduce eye strain. The flicker-free design supports long viewing hours without discomfort. These features improve comfort during long work sessions. Also, the monitor supports flexible connection options for easy setup. It includes HDMI and VGA for wide device compatibility. You can connect laptops, desktops, and media devices easily. Switching between devices becomes fast and simple. In addition, the slim bezel design gives a clean and modern look. It fits well in both home and office setups. The stand supports tilt adjustment for basic viewing comfort. Wall mounting is also supported for a clean desk setup. Moreover, the display works well for office tasks, browsing, and media viewing. Text appears sharp and easy to read. Daily tasks feel smoother and more organized. The monitor blends easily into any workspace style. Overall, the ViewSonic VA2409-H 24″ FHD 750Hz Monitor offers clarity, smooth motion, and daily comfort. It supports work, study, and entertainment with ease. This monitor is a strong choice for users seeking smooth and simple screen performance. Specifications: Display : 24″ IPS Resolution : FHD 1920 x 1080 Refresh Rate : 75Hz Response Time : 3ms
OEM-quality trackpad replacement (without flex cable) for MacBook Pro 13″ (Models A2251 and A2289, 2020) in Silver finish—engineered for precise Force Touch response, smooth multi-touch gestures, and seamless integration with the original chassis. Compatible With: MacBook Pro 13″ (2020, Two Thunderbolt Ports) – Model A2251 (Intel Core i5/i7) MacBook Pro 13″ (2020, Four Thunderbolt Ports) – Model A2289 (Intel Core i5/i7) (Note: Both models share the same trackpad assembly despite port differences.) MacBook Pro 13″ (2020, Two Thunderbolt Ports) – Model A2251 (Intel Core i5/i7) MacBook Pro 13″ (2020, Four Thunderbolt Ports) – Model A2289 (Intel Core i5/i7) (Note: Both models share the same trackpad assembly despite port differences.) Part Type: Trackpad only—does not include the flex cable, Taptic Engine, or mounting hardware. Designed for technicians who will reuse the original internal components. Finish: Silver—matches the Silver MacBook Pro 13″ top and bottom case for perfect aesthetic continuity. Force Touch Support: Fully compatible with pressure-sensitive input and haptic feedback when paired with the original Taptic Engine and logic board—ensuring full macOS gesture functionality (e.g., Force Click, Lookup, Pressure-sensitive drawing). Precision Build: Features the same glass surface texture, curvature, and micro-click mechanism as Apple’s original—delivering consistent tracking accuracy and tactile feel. Installation Requirements: Requires full bottom case disassembly and careful transfer of the original flex cable and Taptic Engine. Adhesive must be applied precisely to maintain structural rigidity and sensor alignment. Recommended for certified or experienced repair technicians only.
The ViewSonic VX2758A-2K-PRO-3 27″ 2K 240Hz Gaming Monitor delivers fast and smooth visuals for serious gaming. Its 2K resolution shows sharp detail and clean image quality. The 27-inch screen gives wide viewing space for full immersion. This helps you enjoy every game scene clearly. Moreover, the ViewSonic VX2758A-2K-PRO-3 27″ 2K 240Hz Gaming Monitor features a powerful 240 Hz refresh rate. This high refresh rate makes motion extremely smooth and fluid. Fast games look clean and responsive at all times. As a result, reaction time improves during competitive play. In addition, the monitor offers a very fast response time. This helps reduce ghosting and motion blur during quick action. Movements feel sharp and accurate on screen. This gives a clear advantage in fast-paced games. Furthermore, the ViewSonic VX2758A-2K-PRO-3 27″ 2K 240Hz Gaming Monitor uses an IPS panel for wide viewing angles. Colors stay accurate from different positions. Images remain bright and clear even from the side. This improves both gaming and content viewing. Also, the monitor supports adaptive sync technology. This helps reduce screen tearing and stuttering during gameplay. Frame changes stay smooth and stable. This keeps the gaming experience clean and enjoyable. In addition, the monitor includes modern connection options. It supports DisplayPort and HDMI for easy setup. You can connect gaming PCs, consoles, and media devices quickly. This adds strong flexibility to your setup. Moreover, the slim bezel design gives the monitor a clean and modern look. It fits well on small and large desks. The stand allows tilt adjustment for simple comfort control. Wall mounting is also supported for clean setups. Overall, the ViewSonic VX2758A-2K-PRO-3 27″ 2K 240Hz Gaming Monitor delivers speed, clarity, and smooth performance in one display. It improves gaming accuracy and visual comfort. This monitor is ideal for fast gaming, daily use, and competitive players. Specifications: Resolution : 2K QHD Display : 27″ IPS Refresh Rate : 240Hz Response Time : 1ms
The Philips 27″ 100Hz LCD Monitor is the perfect choice for work, entertainment, and gaming. It delivers smooth visuals with a high refresh rate, ensuring a seamless viewing experience. With a 100Hz refresh rate, this monitor provides fluid motion, reducing screen tearing and stuttering. Whether you’re watching videos or playing games, you can enjoy clear and sharp visuals. The Full HD resolution ensures crisp details and vibrant colors for an immersive experience. The Philips 27″ 100Hz LCD Monitor features an ultra-slim design that enhances your workspace. Its narrow bezels provide a sleek, modern look, making it perfect for multi-monitor setups. The adjustable stand allows you to find the most comfortable viewing position. Setting up this monitor is easy with multiple connectivity options, including HDMI and VGA ports. It’s compatible with laptops, desktops, and gaming consoles, offering flexibility for different devices. Eye strain is reduced thanks to Philips’ Flicker-Free technology and LowBlue Mode. These features provide a more comfortable viewing experience, especially during long hours of use. Whether you’re working or gaming, your eyes will feel less fatigued. Energy efficiency is another key benefit of the Philips 27″ LCD Monitor. It consumes less power while delivering high performance, making it an eco-friendly choice for your home or office. Upgrade your display today and enjoy smoother visuals, vibrant colors, and ergonomic comfort. The Philips 27″ 100Hz LCD Monitor is a great addition to any setup. Specifications: Display : 27″ VA Resolution : 1920 x 1080 FHD Refresh Rate : 100Hz Response Rate : 4ms
Genuine-spec touchpad flex cable for MacBook Pro 16″ (Model A2485, 2021, M1 Pro/Max)—critical for restoring full Force Touch functionality, haptic feedback, and precise multi-touch gesture control during trackpad repairs. Compatible With: MacBook Pro 16-inch (2021, Model A2485) with Apple M1 Pro or M1 Max chip (Model Identifiers: MacBookPro18,1 / MacBookPro18,2). Part Type: Touchpad flex cable only—does not include the trackpad, Taptic Engine, or mounting hardware. This is the OEM-style ribbon cable that connects the trackpad to the logic board. Function: Transmits touch coordinates, Force Touch pressure data, and haptic feedback signals—essential for macOS gestures (e.g., pinch-to-zoom, Force Click, three-finger lookup) and Taptic Engine operation. OEM-Quality Construction: Precisely replicated to Apple’s original specifications—including cable length, connector type, EMI shielding, and flex routing—ensuring signal integrity and long-term reliability. Common Use Cases: Replacing a torn, frayed, or liquid-damaged original flex cable Completing a trackpad replacement when the original cable is compromised Fixing intermittent trackpad behavior, lost Force Touch, or complete unresponsiveness Replacing a torn, frayed, or liquid-damaged original flex cable Completing a trackpad replacement when the original cable is compromised Fixing intermittent trackpad behavior, lost Force Touch, or complete unresponsiveness Installation Note: Requires full disassembly of the bottom case and careful routing around the battery and logic board. Connectors use ZIF (Zero Insertion Force) sockets—must be aligned and latched gently. Recommended for certified or professional repair technicians only.
Introducing the Samsung Odyssey G6 27—a collection of monitors designed to redefine your visual experience and meet the demands of modern users. Embark on a journey of visual excellence with cutting-edge features that distinguish the Samsung Monitor Series. From vibrant displays to advanced technologies, these monitors ensure a superior and immersive viewing experience for users. Beneath their sleek and modern exteriors lies a commitment to seamless functionality. The Samsung Monitor Series is crafted to deliver not only stunning visuals but also user-friendly interfaces, making them an essential tool for both work and entertainment. Delve into the seamless integration of advanced technologies, ensuring these monitors adapt effortlessly to the evolving demands of modern content consumption. Whether you’re working on detailed tasks, streaming high-definition content, or gaming, the Samsung Monitor Series caters to diverse needs. Portability may not be the focus, but these monitors excel in providing flexible setups for various environments. With their slim profiles and versatile designs, the Samsung Monitor Series ensures your viewing experience remains top-tier. In conclusion, elevate your viewing experience with the Samsung Odyssey G6 27. Immerse yourself in cutting-edge features, vibrant displays, and sleek designs. Choose the Samsung Monitor Series for a monitor lineup that seamlessly blends advanced technology with visual brilliance. Specifications: Display : 27″ VA Resolution : 2560×1440 Response Time : 1ms Refresh Rate : 240Mhz Part Number : LS27BG650EMXUE
The Lenovo ThinkPad T480s features an Intel Core i5 8th Gen processor, 8GB RAM, 256GB NVMe SSD, and a 14-inch Full HD touchscreen. Lightweight, durable, and business-ready, it’s ideal for productivity, office work, and mobile use.
This is a logic board (motherboard) for the MacBook Pro 15" model A1398 (year 2015) with an Intel Core i7 processor and 16 GB of RAM. It’s the central brain of the laptop—everything else plugs into it. If your MacBook won’t turn on, has hardware faults, or logic-board damage, replacing this can restore full functionality (just make sure you choose the right version). This is a logic board (motherboard) for the MacBook Pro 15″ model A1398 (year 2015) with an Intel Core i7 processor and 16 GB of RAM. It’s the central brain of the laptop—everything else plugs into it. If your MacBook won’t turn on, has hardware faults, or logic-board damage, replacing this can restore full functionality (just make sure you choose the right version). This logic board is a high-quality replacement for the 2015 MacBook Pro 15″ Retina (model A1398). It features: Processor: Intel Core i7 (various speed variants) Memory: 16 GB soldered RAM (non-upgradeable) Graphics: Depending on version, either integrated Intel Iris Pro or dual graphics (Intel + AMD Radeon R9 M370X) Chipset & Board Info: Part numbers like 820-00138-A, 820-00163-A are common for these boards Compatibility / Model IDs: Works with MacBookPro11,4 / MacBookPro11,5 (EMC numbers 2909 / 2910) for 2015 A1398 models Ports & I/O Integrated: USB 3.0, HDMI, Thunderbolt 2, SD card slot, audio jack, etc. (same as original MacBook Pro 2015) Storage Interface: PCIe SSD slot (Apple’s proprietary SSD interface) Power & Connectors: Logic board includes connections for battery, fans, display, keyboard, trackpad, I/O board flex cables, etc. Condition / Variants: These boards are often “used / tested” when sold as replacements. Always check that all ports and soldered chips are intact. Risks & Notes: You must match the correct board variant (integrated vs dual GPU) or you can face compatibility issues or missing graphics functions.
Are you ready to take your gaming to the next level? Look no further than the Samsung Odyssey G5 27″ Curved Gaming Monitor. This cutting-edge monitor is designed to deliver an immersive gaming experience like no other. Featuring a stunning 27-inch curved display, the Samsung Odyssey G5 brings your games to life with vibrant colors and crystal-clear visuals. Whether you’re exploring virtual worlds or engaging in epic battles, every detail will be rendered with precision and clarity. With a lightning-fast 165Hz refresh rate, this monitor ensures buttery-smooth gameplay with no lag or stuttering. Say goodbye to screen tearing and motion blur, and hello to an ultra-responsive gaming experience. Equipped with AMD FreeSync technology, the Samsung Odyssey G5 syncs the monitor’s refresh rate with your graphics card, eliminating screen tearing and providing silky-smooth gameplay. Transitioning to its design, the Odyssey G5 features a sleek and stylish aesthetic that will complement any gaming setup. Its slim bezels and curved screen create an immersive viewing experience that pulls you into the action. Connectivity is key for gamers, and the Samsung Odyssey G5 doesn’t disappoint. With HDMI and DisplayPort inputs, you can easily connect your gaming PC, console, or other devices for maximum versatility. Furthermore, the Odyssey G5 comes with a range of gaming-centric features, including customizable gaming modes, black equalizer technology, and low input lag. Whether you’re playing fast-paced shooters or strategy games, you can tailor your gaming experience to suit your preferences. In summary, the Samsung Odyssey G5 27″ Curved Gaming Monitor is the ultimate choice for gamers who demand performance, immersion, and style. Upgrade your gaming setup today and experience gaming like never before. Specifications: Display : 27″ VA Curvature : 1000R Resolution : 2,560 x 1,440 Refresh Rate : 165Hz Response Rate : 1ms
Compact and stylish with a zinc alloy shell, the SatcOp 8‑in‑1 USB‑C Multiport Dock delivers essential ports—Ethernet, HDMI, USB, card readers, and charging—in one portable adapter. Ideal for powering your laptop while expanding connectivity on the go. 🖥️ HDMI Port – Connect to external displays in Full HD or 4K (depending on your host device). 🌐 RJ45 Ethernet Port – Provides stable wired internet access with gigabit-speed support. ⚡ USB-C PD Charging – Power your laptop while using other ports (up to 87W pass-through). 🔌 USB 3.0 & USB 2.0 Ports – Connect flash drives, external storage, keyboards, and mice. 💾 SD & TF Card Readers – Quick access to camera and device storage cards. 🧊 Material – Premium zinc alloy casing for durability and efficient heat dissipation. 💼 Design – Slim, lightweight, and perfect for travel, home, or office setups. 💻 Compatibility – Works with most USB-C laptops, including Windows, macOS, Chrome OS, and select Android tablets.
WiWU Linker 721HD Hub – Compact USB-C hub with 7 ports including 100W PD, dual USB-A, USB-C data, HDMI 4K60, and dual SD/TF slots.Aluminum body, plug‑and‑play compatibility with MacBooks and modern USB‑C devices—ideal for laptop expansion. Model: Linker 721HD (WiWU) Material: Aluminum-alloy shell Ports: 2 × USB‑A 3.1 1 × USB‑C 3.1 (data) 1 × USB‑C PD power delivery (up to 100 W) 1 × HDMI (4K @ 60 Hz) SD card slot + micro‑SD (TF) slot (USB 3.0 speed) Ports: 2 × USB‑A 3.1 1 × USB‑C 3.1 (data) 1 × USB‑C PD power delivery (up to 100 W) 1 × HDMI (4K @ 60 Hz) SD card slot + micro‑SD (TF) slot (USB 3.0 speed) Cable: Fixed USB‑C male cable (approx. 15 cm) Compatibility: Plug-and-play with USB-C/Thunderbolt 3/4 devices (MacBook, XPS, Chromebooks, mobile devices with DP-Alt Mode) Design: Compact, space gray finish optimized for travel/work setups Weight: ~150 g
HP Gk400F Mechanical USB Gaming Keyboard, Dust & Spill Resistant, RGB Backlit Keys, Metal Panel, Full-Sized Keyboard Design About this item [Quick. Comfy. Accurate] Comfortable and Durable full-sized keyboard designed. [Plug-in and type] Get to typing quicker with the USB plug-and-play setup that’ll have you connecting to your PC faster and easier than ever [Dust-proof & splash-proof] Mechanical metal panel, dust and spill. Resistant. [All-day comfort] This keyboard is designed for optimal comfort to fit your natural position, keeping your wrist feeling good all day. [Let there be LED] Lightsync RGB Backlit Keys and auto sleep mode support.Brilliant RGB Color Spectrum illumination.
