Genuine-spec UK layout (QWERTY) black keyboard replacement for MacBook Air 13.6″ and 15″ models (2023–2025, M2/M3/M4 chips)—featuring Apple’s Magic Keyboard design with scissor-switch mechanism, backlighting, and precise OEM fit. Compatible With: 13.6″ MacBook Air: A2681 (M2, 2022–2023), A3113 (M3, 2023–2024), A3240 (M4, 2024–2025) 15″ MacBook Air: A2941 (M2, 2023), A3114 (M3, 2023–2024), A3241 (M4, 2024–2025) 13.6″ MacBook Air: A2681 (M2, 2022–2023), A3113 (M3, 2023–2024), A3240 (M4, 2024–2025) 15″ MacBook Air: A2941 (M2, 2023), A3114 (M3, 2023–2024), A3241 (M4, 2024–2025) Keyboard Layout: UK English (QWERTY) with £ symbol, taller Enter key, and standard UK key labeling—matches Apple’s original regional configuration. Design: Apple’s Magic Keyboard with scissor-switch mechanism—offering quiet, responsive typing with 1mm travel and improved reliability. Features: Backlit keys, ambient light sensor support, and original-style flex cable connector for seamless integration with the logic board. Color: Matte black keycaps matching the Space Gray and Midnight MacBook Air finishes (also compatible with Silver/Starlight—keycaps are model-agnostic). Precision Engineering: Manufactured to exact OEM specifications for fit, alignment, and tactile performance—ensures flush mounting within the top case. Installation Note: Keyboard is glued into the top case and requires full disassembly and careful re-adhesion. Recommended for professional technicians only due to complexity and risk of damage.
Specifications : Dell Alienware 25 Monitor – AW2521HFL – 63.5cm(25″) Device Type LED edgelight system Panel Type Fast In-Plane Switching Type Native Resolution 1920 x 1080 @ 240 Hz Contrast Ratio 1000 to 1 (typical) Features USB 3.0 Hub Aspect Ratio 16:09 Brightness 400 cd/m² (typical) Response Time 1ms (gray to gray) – Extreme Mode Input Connectors 2 x HDMI (ver 2.0) 1 x DP 1.2 1 x USB 3.0 upstream port (Rear) 2 x USB 3.0 Downstream port (Rear) 2 x USB 3.0 Downstream port [Front Bottom, one with BC1.2 charging capability at 2A(max)] 1 x Headphone-out jack (Front Bottom) 1 x Audio Line-out jack( Rear) manufacturer link
The MSI G244F 24″ 180Hz Gaming Monitor is designed for smooth, fast-paced gaming. With a 180Hz refresh rate, it delivers ultra-smooth visuals for an immersive experience. Say goodbye to screen tearing and lag during intense gameplay. This 24-inch gaming monitor features an IPS panel for vibrant colors and wide viewing angles. Whether you’re gaming or streaming, the visuals are sharp and detailed. The Full HD resolution ensures crisp images, making every detail stand out. The MSI G244F supports a 1ms response time for quick reactions. This reduces motion blur, giving you a competitive edge in fast-action games. It’s perfect for FPS, racing, and esports titles where speed matters. Setting up the monitor is simple with its versatile connectivity options. It includes HDMI and DisplayPort inputs, making it compatible with PCs, consoles, and laptops. The adjustable stand allows you to tilt the screen for the best viewing angle. Additionally, the MSI G244F 24″ 180Hz Gaming Monitor features anti-flicker and blue light reduction technologies. These reduce eye strain, so you can play longer without discomfort. It’s designed to keep you comfortable during long gaming sessions. With its sleek, modern design, this monitor looks great in any gaming setup. The slim bezels offer a more immersive viewing experience, especially in multi-monitor setups. Upgrade your gaming experience with the MSI G244F 24″ 180Hz Gaming Monitor and enjoy fluid, responsive gameplay. Specifications: Display : 23.8” Rapid IPS Resolution : 1920 x 1080 (FHD) Refresh Rate : 180Hz Response Rate : 1ms
NETIS ST-3108 8-Port Fast Ethernet Switch Network Desktop Hub Retail Eight (8) 10/100Mbps RJ45 ports, Auto-Negotiation & Auto MDI/ MDIX IEEE 802.3x flow control for Full Duplex mode and back pressure for Half Duplex mode 1.6Gbps switching fabric capacity/backplane bandwidth Green Ethernet technology for effective power saving LED indicators for simple diagnostics and management Plug and play, no configuration required Compact plastic case, desktop design for home and office use Interface: 8* 10/100M TX ports LED: PWR, 1-8 Cabling Type 10Base-T:UTP Cat.3 or up, 100Base-TX:UTP Cat.5 or up Standard: IEEE 802.3 10Base-T, IEEE 802.3u 100Base-TX,IEEE802.3ab 1000Base-T Access Method: CSMA/CD Transmission Method: Store and Forward Data Transmission Rate: 10/100Mbps(Half-duplex), 20/200Mbps(Full-duplex) MAC Address Table: 1K Operating Temperature: 0-40C Storage Temperature: -40, 70C Operating Humidity: 10%-90%RH non-condensing Storage Humidity: 5%-90%RH non-condensing Input: 100-240V 0.2A 50/60HZ Output:DC 9V/500mA
SanDisk Ultra Flair USB 3.0 – SDCZ73 – High-speed flash drive with sleek metal design.Up to 150MB/s transfer speeds and password protection software included. Model: SanDisk Ultra Flair USB 3.0 Flash Drive (SDCZ73) Interface: USB 3.0 (Backward compatible with USB 2.0) Read Speed: Up to 150MB/s (on supported USB 3.0 ports) Capacity Options: 64GB / 128GB / 256GB Material: Sleek and durable metal casing Design: Compact with built-in keyring loop Security: Includes SanDisk SecureAccess software for password protection Compatibility: Windows, macOS (reformat may be required), Linux Dimensions: Approx. 42.42 x 13.21 x 6.60 mm Weight: Approx. 5.2 grams
128GB SSD Apple Macbook Pro Air 2013 2014 2015 A1502 A1398 A1466 A1465 | Samsung MZ-JPU512T/A06 | 655-1805D ORIGINAL APPLE PART (Apple sources their SSD’s for MacBooks from Samsung) A1502 – A1398 – A1465 – A1466 100% TESTED WORKING Please check compatibility below before you make your purchase: COMPATIBILITY: MacBook Pro Retina Late 2013 – Mid-2015 MacBookPro11,1 (A1502) – ME864LL/A, ME866LL/A, ME867LL/A, MGX72LL/A, MGX92LL/A, & MGXD2LL/A MacBookPro11,2 (A1398) – ME293LL/A & MGXA2LL/A MacBookPro11,3 (A1398) – ME294LL/A, ME874LL/A, MGXC2LL/A, & MGXG2LL/A MacBookPro11,4 (A1398) – MJLQ2LL/A MacBookPro11,5 (A1398) – MJLT2LL/A & MJLU2LL/A MacBookPro12,1 (A1502) – MF839LL/A, MF841LL/A, & MF843LL/A MacBook Air Mid-2013 – Late 2015 MacBookAir6,1 (A1465) – MD711LL/A, MD760LL/A, MD711LL/B, & MF067LL/A MacBookAir6,2 (A1466) – MD760LL/A, MD760LL/B, & MF068LL/A MacBookAir7,1 (A1465) – MJMVM2LL/A MacBookAir7,2 (A1466) – MJVE2LL/A Model Identifier: Samsung Manufacturer Part# MZ-JPU512T/A06
The ViewSonic VA24D1-H 24″ FHD 100Hz Monitor delivers smooth and clear visuals for work, gaming, and daily use. It offers Full HD resolution with bright colors. The screen shows sharp details that improve movies, documents, and web browsing. This makes your viewing experience more comfortable. Moreover, the ViewSonic VA24D1-H 24″ FHD 100Hz Monitor includes a fast 100Hz refresh rate. This feature reduces motion blur and screen tearing. It makes gaming and fast scenes much smoother. It also improves general tasks like scrolling and tracking movement. In addition, the monitor features HDMI and VGA connections. These ports make setup quick and simple. You can connect laptops, desktops, and media players easily. This gives you strong flexibility for work and entertainment. Furthermore, the ViewSonic VA24D1-H 24″ FHD 100Hz Monitor includes important eye-care technology. The flicker-free screen helps reduce eye strain. The blue light filter adds more comfort during long hours. This makes the monitor ideal for study, office work, and long sessions. Also, the slim bezel design gives the monitor a modern and clean look. It fits well in home and office spaces. The thin edges help create smooth multi-monitor setups. This improves both productivity and style. The stand on the ViewSonic VA24D1-H 24″ FHD 100Hz Monitor offers stable support. You can tilt the screen to find a comfortable angle. This helps you maintain a healthy posture. It also improves your overall viewing comfort. Overall, the ViewSonic VA24D1-H 24″ FHD 100Hz Monitor offers clarity, smooth motion, and strong comfort. It works well for gaming, streaming, office tasks, and daily use. It is a reliable monitor for users who want simple performance and modern design. Specifications: Display : 24″ IPS Resolution : 1920×1080 Refresh Rate : 100Hz Response Time : 5ms
Verbatim Vi3000 512 GB NVMe SSD — high-speed PCIe 4.0 storage for desktops & laptops.• Read up to 5,000 MB/s • Write up to 3,200 MB/s • Compact M.2 2280 form factorInterface: PCIe Gen 4 × 4 NVMe 1.4 | Warranty: 3 Years | SKU: Vi3000-512G 🟣 Full Details : The Verbatim Vi3000 512 GB PCIe NVMe M.2 SSD delivers blazing-fast performance for everyday computing, gaming, and creative work. Using the latest PCIe Gen 4 × 4 NVMe 1.4 interface, it achieves read speeds up to 5,000 MB/s and write speeds up to 3,200 MB/s, making it a great upgrade for faster boot times and quicker app loading. PCIe Gen 4 × 4 NVMe 1.4 interface for ultra-fast transfer speeds Up to 5,000 MB/s read and 3,200 MB/s write performance Compact M.2 2280 design for desktops & laptops Low power consumption and quiet operation 3-year limited warranty with Verbatim reliability Works with most modern desktops and laptops that support M.2 NVMe (PCIe) drives. Fully backward compatible with PCIe 3.0 systems (at lower speeds). Verbatim Vi3000 512 GB M.2 NVMe SSD Quick installation & warranty guide
TT03XL Laptop Battery Compatible with Hp EliteBook 850 G5 850 G6 ZBook 15U G5 15U G6 Series Notebook 932824-2C1 933322-855 932824-421 HSTNN-LB8H HSTNN-DB8K 11.55V 56Wh 4610mAh About this item 【Battery type】Li-ion. Voltage: 11.55V. Capacity: 56Wh 4610mAh. 【Replacement For Laptop】Hp EliteBook 850 G5 G6, ZBook 15U G5 G6 Series . 【Compatible Part Number】TT03XL 932824-2C1 933322-855 932824-421 HSTNN-LB8H HSTNN-DB8K TTO3XL. 【Connector】Before placing your order, Please refer to the picture and check it. Because the products produced by different factories will have differences in size, cable length, interface, etc. 【Use Skills】If the new battery is not recognized during the initial installation, please reinstall and check if the interface is fully connected. Discharge the new battery to 5% (not 0%), then charge and cycle 3-4 times to wake up the new battery.
Genuine-spec touchpad flex cable for Apple’s 12-inch MacBook (Model A1534, Early 2015 / Early 2016 / Mid 2017)—essential for restoring full Force Touch trackpad functionality, haptic feedback, and multi-touch gesture support. Compatible With: MacBook 12″ (Early 2015) – 1.1GHz Core M MacBook 12″ (Early 2016) – 1.1GHz/1.3GHz Core M MacBook 12″ (Mid 2017) – 1.2GHz/1.3GHz Core m3/i5/i7 All share Model Number A1534 and Model Identifier MacBook8,1 / MacBook9,1 / MacBook10,1 respectively. MacBook 12″ (Early 2015) – 1.1GHz Core M MacBook 12″ (Early 2016) – 1.1GHz/1.3GHz Core M MacBook 12″ (Mid 2017) – 1.2GHz/1.3GHz Core m3/i5/i7 All share Model Number A1534 and Model Identifier MacBook8,1 / MacBook9,1 / MacBook10,1 respectively. Part Type: Touchpad flex cable only—does not include the trackpad housing, Taptic Engine, or mounting brackets. This is the ribbon cable that connects the Force Touch trackpad to the logic board. Function: Critical for Force Touch functionality—transmits pressure-sensitive input, multi-touch gestures (e.g., pinch, swipe, Force Click), and haptic feedback signals to the Taptic Engine. OEM-Quality Construction: Precisely matches Apple’s original in length, connector pitch, shielding, and routing—ensures reliable signal integrity and compatibility with macOS. Common Use Cases: Replacing a torn, creased, or liquid-damaged flex cable Restoring unresponsive or erratic trackpad behavior Completing a trackpad replacement when the original cable is unusable Replacing a torn, creased, or liquid-damaged flex cable Restoring unresponsive or erratic trackpad behavior Completing a trackpad replacement when the original cable is unusable Installation Note: Requires full bottom case removal and delicate disconnection of the ZIF connector. The cable routes tightly under the battery—extreme care is required. Recommended for experienced or certified technicians only.
The Samsung 75″ QLED 4K Q60F Smart TV QA75Q6FAAUXTW delivers a large-screen entertainment experience with advanced QLED display technology. It produces bright colors, sharp details, and impressive clarity, making movies, sports, and games more enjoyable on the expansive 75-inch screen. QLED technology uses Quantum Dot enhancement to improve color accuracy and brightness. As a result, images appear vivid and lifelike across a wide range of content. Dark scenes retain detail, while bright scenes remain balanced and clear. This helps create a consistent viewing experience throughout the day. The 4K UHD resolution provides four times the detail of Full HD content. Therefore, images look sharper and more refined. In addition, Samsung’s processing technology enhances lower-resolution content, helping it appear clearer and closer to 4K quality. HDR support improves contrast and expands the range of visible colors. This allows brighter highlights and deeper shadows, creating a more realistic picture. Fast-moving scenes also appear smoother, making sports broadcasts and action movies more enjoyable to watch. The Smart TV platform offers convenient access to popular streaming services, apps, and connected home features. It responds quickly and provides an easy-to-use interface for everyday entertainment. In addition, the slim design and narrow bezels give the Samsung QLED 75 4K Q60F Smart TV QA75Q6FAAUXTW a modern appearance that complements a variety of living spaces. Overall, this Samsung QLED TV combines large-screen immersion, vibrant color performance, and smart connectivity for a reliable home entertainment solution. Specifications: QLED technology delivers vibrant colors and enhanced brightness 75-inch 4K UHD display provides immersive viewing HDR improves contrast and image realism Smart TV platform supports streaming apps and connected features Slim design complements modern living spaces
The Samsung Crystal UHD U8000F 65″ 4K TV UA65U8000FUXTW uses a 65-inch LCD panel with 3840 × 2160 resolution. It delivers standard 4K performance for everyday viewing. Samsung uses the Crystal Processor 4K for image processing and upscaling. As a result, lower-resolution content converts closer to 4K output. In addition, the TV supports HDR10 and HDR10+, which improve contrast between bright and dark scenes. The display runs at a 60 Hz refresh rate. Also, Motion Xcelerator reduces blur in fast motion content such as sports and action. Samsung equips the TV with Tizen OS. Therefore, users access streaming apps, SmartThings features, and basic voice control options depending on setup. Connectivity includes HDMI, USB, Wi-Fi, Bluetooth, Ethernet LAN, and optical audio output. In addition, the TV supports ALLM for basic gaming response time. This model focuses on 4K resolution, standard HDR support, and essential smart features without advanced gaming or local dimming systems. Specifications: 65-inch LCD panel with 3840 × 2160 4K UHD resolution Crystal Processor 4K with 4K upscaling support HDR10 and HDR10+ compatibility 60 Hz native refresh rate with Motion Xcelerator Tizen OS with HDMI, USB, Wi-Fi, Bluetooth, Ethernet connectivity
Remax F21 Ruiyal Series – Oscillating water‑cooling fan with 4,000 mAh battery, digital display, and 6 wind levels.Portable and stylish small-table fan with 3 oscillation modes and mist spray cooling. Model: Remax F21 Ruiyal Series Water‑Cooling Oscillating Fan (White) Battery & Power: Built‑in 4,000 mAh battery; USB‑C rechargeable (details unspecified) Cooling Method: Water‑cooling spray system with turbine-style fan blades Wind Speed: 6 adjustable speed levels Oscillation: 3 movement modes—approx. 45°, 90°, or 120° Display & Controls: Digital display showing mode, speed, and battery indicators Dimensions & Weight: Compact tabletop size, ~868 g Power Consumption: Around 8W rated power
BenQ Board Essential RE7504N 75” 4K UHD Interactive Flat Panel is a large interactive display designed for education and business collaboration. It supports touch input, built-in Android system, and 4K resolution for presentations and group work. It features a 75-inch IPS panel with 3840 × 2160 4K UHD resolution. Therefore, it delivers sharp visuals and wide viewing angles. In addition, it supports up to 40-point multi-touch for group interaction. Moreover, it runs Android (EDLA-supported system depending on region). As a result, users can run apps, whiteboard tools, and content directly on the display without a PC. The screen includes anti-glare coating. Therefore, it stays readable in bright rooms. In addition, it supports 4K 60Hz output for smooth visuals. Furthermore, it includes HDMI, USB, LAN, and OPS slot connectivity. As a result, it works with laptops, external PCs, and modular systems. It also includes built-in speakers for basic audio output. Therefore, it supports lessons and meetings without external speakers. Finally, the BenQ RE7504N provides a large interactive 4K workspace for classrooms and business collaboration. Specifications: Display: 75-inch IPS panel with 3840×2160 4K UHD resolution Touch: Up to 40-point multi-touch support System: Android-based interactive platform (EDLA support depending on region) Connectivity: HDMI, USB, LAN, and OPS slot support Display: Anti-glare screen with 4K 60Hz output for smooth visuals
NB OMS035 NB Desk Mount with Keyboard Tray for 19-27 Inch Screens Up to 9Kg Load Full Motion • Desk Stand offers comfortable viewing position that promotes healthy movements and requires minimum space at home or the office • Fits most 19 to 27 inch screens with ultra-wide foldable keyboard tray • Full motion mount with rotation 360°, swivel ±90° and Tilt angle +12° to -15° • The mount has an extension of 40” (1020 mm), retraction of 3.9” (100mm) and an upright lift distance of 18.9” (480mm) • Design includes a durable gas-strut to hover at any working position • Built-in extra shelf for phone and small goods storage • Supports load from 2 to 9 kg • Mounting VESA compliance 75×75 mm and 100×100 mm • Product dimensions: 24 x 7.3 x 14.4 cm Specifications: Specifications • NB Desk Mount with Keyboard Tray for 19-27 Inch Screens Up to 9Kg Load Full Motion • Desk Stand offers comfortable viewing position that promotes healthy movements and requires minimum space at home or the office • Fits most 19 to 27 inch screens with ultra-wide foldable keyboard tray • Full motion mount with rotation 360°, swivel ±90° and Tilt angle +12° to -15° • The mount has an extension of 40” (1020 mm), retraction of 3.9” (100mm) and an upright lift distance of 18.9” (480mm)
The MSI Optix G32C4W 32″ Monitor delivers immersive visuals and smooth performance for gaming and everyday use.It features a 32-inch Full HD curved display that provides a wide field of view and enhanced immersion. Moreover, its high refresh rate ensures fluid motion during fast-paced games and videos. This monitor uses a VA panel for strong contrast and deep colors. 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, the curved design and tilt adjustment help you find a comfortable viewing angle during long sessions. Low blue light and flicker-free technologies reduce eye strain over extended use. This display is ideal for gamers, esports enthusiasts, and home users alike. Therefore, it supports competitive gaming, media streaming, and productivity tasks. Finally, it combines sharp visuals, smooth performance, and comfort features for daily use. Specifications: Screen Size: 32″ Full HD curved VA panel Resolution: 1920 × 1080 Refresh Rate: High for smooth motion Ports: HDMI + DisplayPort Features: Anti-glare, low blue light, flicker-free eye care
This replacement touchpad for MacBook Air A2179 comes in Rose Gold and is sold without the flex cable. Perfect for restoring smooth trackpad performance, it’s ideal for repair technicians and users replacing a damaged or non-working touchpad. The MacBook Air A2179 Touchpad (Rose Gold) is a high-quality replacement part designed to restore full trackpad functionality to your laptop. Whether your original touchpad is unresponsive, physically damaged, or experiencing tracking issues, this replacement provides a reliable solution. Please note that this unit is without the flex cable, meaning it requires the original flex or a separate replacement flex for installation. Ideal for repair shops and technicians, it ensures smooth navigation and precise control. Compatible with MacBook Air A2179 Rose Gold Color Match for original look and finish Replacement Touchpad Only (without flex cable) Restores Smooth Trackpad Functionality Precision Tracking & Gesture Support (when installed correctly) Ideal for Repairs & Replacements High-Quality Build designed for durability and long use Designed specifically for Apple MacBook Air A2179 models. Recommended for technicians and repair shops or users replacing a faulty touchpad. Ensure compatibility before purchase and note that a flex cable is required for installation.
WiWU S500 Foldable Lightweight Plastic Laptop Stand Description WiWU S500 Foldable Lightweight Plastic Laptop Stand Brand: wiwu Material: ABS+Aluminum alloy Foldable Height Adjustment. Laptop stand with foldable technology, light weight, easy to carry Adjustable from 20 to 40 degrees and height adjustable from 3.15 to 5.12 inches. There are 6 corners Compatible with laptops (11 inch-15 inch) Macbook, iMac, ipad, Microsoft Surface PR, Thinkpad, Lenovo, Dell, HP and more. With anti-slip rubber pad
The MSI MAG 275CQF E18 is a 27-inch curved gaming monitor built for immersive and smooth gameplay with WQHD resolution (2560 × 1440). It delivers vibrant visuals and responsive performance for gamers seeking clarity and speed. Furthermore, its rapid panel enhances action scenes and detailed environments effectively. It features a 180 Hz refresh rate and a 0.5 ms (GtG) response time, which help reduce motion blur and improve tracking in fast‑paced games. In addition, Adaptive‑Sync support minimizes screen tearing for fluid gameplay. The Rapid VA panel produces rich colors and deep contrast. Moreover, HDR Ready technology enhances contrast and shadow detail for more realistic visuals. Anti‑Flicker and Less Blue Light technologies improve viewing comfort during long sessions. As a result, players stay focused and comfortable. The monitor also supports AI Vision, which boosts brightness and color saturation in darker scenes. In addition, HDMI™ CEC console mode improves compatibility with game consoles. Consequently, MAG 275CQF E18 provides enjoyable gaming whether on PC or console. This monitor combines high refresh performance, curved immersion, and advanced color features to enhance both competitive and casual gaming experiences. Specifications: 27-inch WQHD (2560 × 1440) curved Rapid VA panel 180 Hz refresh rate with 0.5 ms (GtG) response time Adaptive‑Sync support for smooth performance HDR Ready with Anti‑Flicker and Less Blue Light technologies AI Vision and HDMI™ CEC console mode compatibility
The MSI Modern MD272UPHG 27″ 4K Monitor offers sharp visuals and modern design for work and entertainment. It delivers Ultra HD 4K resolution for detailed images and text. This makes it ideal for productivity, creativity, and media use. The 27-inch screen size provides enough space for multitasking. It allows users to work on multiple windows with ease. The slim bezels add to a modern and clean look. The MSI Modern MD272UPHG 27″ 4K Monitor features IPS technology. This ensures wide viewing angles and consistent colors. It is perfect for sharing content or collaborative tasks. With HDR support, colors look more vivid and natural. Contrast is improved for lifelike images and realistic visuals. This enhances both work presentations and entertainment experiences. The monitor includes Eye Care technology for comfort. Blue light reduction and anti-flicker features reduce eye strain. This makes it suitable for long working hours. It also provides ergonomic adjustments for better posture. You can tilt, swivel, pivot, or adjust the height. This helps create a comfortable setup for any workspace. Connectivity options are versatile and convenient. The monitor supports HDMI, DisplayPort, and USB-C connections. It is easy to connect laptops, desktops, or external devices. The design is sleek, modern, and professional. It blends well with both home and office setups. Its sturdy build ensures reliability for everyday use. In short, the MSI Modern MD272UPHG 27″ 4K Monitor delivers sharp resolution, eye comfort, and flexible adjustments. It is a great choice for professionals and everyday users. Specifications: Display : 27″ IPS Screen : 3840 x 2160 (UHD) Refresh Rate : 60Hz Response Rate : 4ms
