Sleek, ultra-thin 24-inch Full HD display with micro-edge design, flicker-free technology, and versatile connectivity—ideal for productivity, home office, or multi-display setups. Model: HP V24v G5 Screen Size: 23.8 inches (viewable), 24-inch class Display Type: IPS (In-Plane Switching) panel Resolution: 1920 x 1080 (Full HD) at 60Hz Brightness: 250 cd/m² Contrast Ratio: 1,000:1 (static), 10,000,000:1 (dynamic) Response Time: 7 ms (gray-to-gray) Viewing Angles: 178° horizontal / 178° vertical (excellent color consistency from wide angles) Design Features: 3-sided micro-edge bezel – ideal for seamless multi-monitor setups Ultra-slim profile – modern, minimalist aesthetic Tilt-only stand: -5° to +25° VESA Mount Compatible: 100 x 100 mm (stand removable) 3-sided micro-edge bezel – ideal for seamless multi-monitor setups Ultra-slim profile – modern, minimalist aesthetic Tilt-only stand: -5° to +25° VESA Mount Compatible: 100 x 100 mm (stand removable) Connectivity: 1 x HDMI 1.4 1 x VGA (D-Sub) Audio Line-out (3.5mm) – for use with external speakers/headphones No built-in speakers 1 x HDMI 1.4 1 x VGA (D-Sub) Audio Line-out (3.5mm) – for use with external speakers/headphones No built-in speakers Eye Comfort & Sustainability: Flicker-free backlight HP Eye Ease (TÜV-certified low blue light mode—reduces eye strain without color distortion) ENERGY STAR® certified Made with post-consumer recycled plastics (up to 85% in enclosure) Flicker-free backlight HP Eye Ease (TÜV-certified low blue light mode—reduces eye strain without color distortion) ENERGY STAR® certified Made with post-consumer recycled plastics (up to 85% in enclosure) Ideal For: Home office & remote work Students and professionals Dual/triple monitor productivity setups Everyday computing, web browsing, and document editing Home office & remote work Students and professionals Dual/triple monitor productivity setups Everyday computing, web browsing, and document editing Dimensions (with stand): 21.26 x 7.76 x 15.83 in (540 x 197 x 402 mm) 21.26 x 7.76 x 15.83 in (540 x 197 x 402 mm) Weight: ~7.5 lbs (3.4 kg)
Brand Crucial Computer Memory Size 8 GB RAM Memory Technology DDR4 Memory Speed 2666 MHz Compatible Devices Laptop, PC Improve your system's responsiveness, run apps faster and multitask with ease Install with ease; no computer skills required How-to guides available at Crucial Compatibility assurance when using the Crucial System Scanner or Crucial Advisor Tool Micron quality and reliability is backed by superior component and module level testing and 42 years of memory expertise ECC Type = Non-ECC, Form Factor = SODIMM, Pin Count = 260-pin, PC Speed = PC4-21300, Voltage = 1.2V, Rank and Configuration = 1Rx16, 1Rx8 or 2Rx8 Brand Crucial Computer Memory Size 8 GB RAM Memory Technology DDR4 Memory Speed 2666 MHz Compatible Devices Laptop, PC Improve your system’s responsiveness, run apps faster and multitask with ease Install with ease; no computer skills required How-to guides available at Crucial Compatibility assurance when using the Crucial System Scanner or Crucial Advisor Tool Micron quality and reliability is backed by superior component and module level testing and 42 years of memory expertise ECC Type = Non-ECC, Form Factor = SODIMM, Pin Count = 260-pin, PC Speed = PC4-21300, Voltage = 1.2V, Rank and Configuration = 1Rx16, 1Rx8 or 2Rx8
Genuine-spec touchpad flex cable for MacBook Pro 15″ (Model A1990, 2018–2019, Intel)—essential for restoring full Force Touch functionality, haptic feedback, and precise multi-touch gesture control during trackpad repair or replacement. Compatible With: MacBook Pro 15-inch (2018 & 2019, Model A1990, Model Identifiers MacBookPro15,2) with Intel Core i7/i9 processors. Part Type: Touchpad flex cable only — does not include the trackpad housing, Taptic Engine, or mounting hardware. This is the OEM-style ribbon cable that connects the trackpad to the logic board. Function: Transmits: Touch input coordinates Force Touch pressure data Haptic feedback signals to the Taptic Engine Enables full macOS gesture support: Force Click, three-finger lookup, swipe navigation, pinch-to-zoom, and smooth cursor tracking. Touch input coordinates Force Touch pressure data Haptic feedback signals to the Taptic Engine Enables full macOS gesture support: Force Click, three-finger lookup, swipe navigation, pinch-to-zoom, and smooth cursor tracking. OEM-Quality Build: Matches Apple’s original specifications in: Cable length and routing path Connector pitch and ZIF latch design EMI shielding and flex durability Cable length and routing path Connector pitch and ZIF latch design EMI shielding and flex durability Common Use Cases: Replacing a torn, creased, or liquid-damaged original flex cable Completing a trackpad replacement when the original cable is unusable Fixing intermittent trackpad behavior, loss of Force Touch, or complete unresponsiveness Replacing a torn, creased, or liquid-damaged original flex cable Completing a trackpad replacement when the original cable is unusable Fixing intermittent trackpad behavior, loss of Force Touch, or complete unresponsiveness Installation Note: Requires full bottom case removal and battery disconnection. Cable routes under internal components near the right speaker and logic board. Connects via a ZIF (Zero Insertion Force) socket—must be aligned carefully and latched gently. Recommended for experienced or certified technicians only. Requires full bottom case removal and battery disconnection. Cable routes under internal components near the right speaker and logic board. Connects via a ZIF (Zero Insertion Force) socket—must be aligned carefully and latched gently. Recommended for experienced or certified technicians only.
REMAX RB-M61 SPEAKER 5.4 CRIMSOY SERIES PORTABLE WIRELESS SPEAKER WITH LIGHTS (140W) Product name: RB-M61 Crimson Series Portable Wireless Speaker with Lights Wireless version: V5.4 Transmission distance: 12M Frequency response: 40HZ-18KHZ Impedance: 4O Rated power: 140W Battery capacity: 24000mAH Input: 5V 3A Drive unit: 103mm*2+57mm*2 Standby time: 6 months Playtime: 20h Product size: 343mm*120*244.3mm Product color: Black, Silver Charging time: 8 hours Product net weight: 4.56KG
Porodo Gaming Wide PDX523-BK The Porodo Gaming Wide Ultra Curved Monitor has been updated with the capability and clarity you need to game at your best. It is now quicker than ever with a refresh rate of up to 165Hz. The newest Porodo Gaming monitor still features an IPS panel with 2560 x 1440 resolution. and is based upon the former slim cable management stand, offering you a streamlined. visual experience both on screen and on your desk. It is the ideal blend of style and performance. Play games without lagging and entirely get rid of input lag. Play an FPS game. or go on an adventure in a mysterious land while enjoying a variable refresh rate display that works with your graphics card. Specifications Response Time: 6.5ms Contrast Ratio: 3500:1 Surface Treatment: Anti-Glare Active Area: 697.344mm x 392.256mm Pixel Pitch: 0.2724mm x 0.2724mm Maximum Resolution: 2560 x 1440 @165Hz Backlight Type: ELED Aspect Ratio: 16:9 Panel Type: Super Speed VA Panel Size: 31.5” Diagonal The Porodo Gaming Ultra Wide Curved Monitor has been updated with the capability and clarity you need to game at your best. It is now quicker than ever with a refresh rate of up to 165Hz. The newest Porodo Gaming monitor. still features an IPS panel with 2560 x 1440 resolution and is based upon the former slim cable management stand. offering you a streamlined visual experience both on screen and on your desk. It is the ideal blend of style and performance. Play games without lagging and entirely get rid of input lag. Play an FPS game or go on an adventure in a mysterious land while enjoying . a variable refresh rate display that works with your graphics card. The Porodo Gaming Ultra Wide Curved Monitor has been updated with the capability and clarity. you need to game at your best. It is now quicker than ever with a refresh rate of up to 165Hz. The newest Porodo Gaming monitor still features an IPS panel with 2560 x 1440 resolution. and is based upon the former slim cable management stand, offering you a streamlined . visual experience both on screen and on your desk. It is the ideal blend of style and performance. Play games without lagging and entirely get rid of input lag. Play an FPS game. or go on an adventure in a mysterious land while enjoying a variable refresh rate display that works with your graphics card. Specifications: Specifications VA Curved R1500 Panel Type High Dynamic Range Anti-Glare Surface Treatment 31.5” Diagonal Panel Size 16.7M Display Color 16:9 Aspect Ratio 2560 x 1440 @165Hz Maximum Resolution 2-3 Weeks For delivery on order 1 year warranty Manufacturer Link
The Samsung 24 inch 120Hz Essential Monitor S3 S32GF delivers smooth visuals with a Full HD display and fast refresh rate. Additionally, the 120Hz panel improves motion clarity, which makes it suitable for daily tasks and light gaming. The slim design also fits easily into modern workspaces. Moreover, the monitor uses a quality panel that provides consistent colors and clear details from different viewing angles. Therefore, it supports both productivity and entertainment use. Eye Saver Mode and flicker free technology also help reduce eye strain during long sessions. Furthermore, connectivity is simple and practical with HDMI and VGA inputs for flexible device support. In addition, the monitor is easy to set up and use for home or office environments. Overall, the Samsung 24 inch 120Hz Essential Monitor S3 S32GF is a reliable everyday display. Specifications: 24 inch Full HD display delivers clear and sharp visuals for daily use 120Hz refresh rate provides smoother motion for videos and light gaming Eye Saver Mode and flicker free technology help reduce eye strain Slim and modern design fits easily into home or office setups HDMI and VGA connectivity allow easy connection to multiple devices
Replacement DC in Power Jack Connector I/O USB-C Board Charging Port Compatible with MacBook Pro 13" 15" 16" Model A1989 A1990 A2141 A2159 A2251 A2289 A2338 Mid 2018-2020 Replacement DC in Power Jack Connector I/O USB-C Board Charging Port Compatible with MacBook Pro 13″ 15″ 16″ Model A1989 A1990 A2141 A2159 A2251 A2289 A2338 Mid 2018-2020 About this item If your USB-C ports aren’t functioning properly, replacing this board is a good place to start. These are also referred to as Thunderbolt 3 ports. Please double-check the pictures and model numbers to see if they fit your laptop to avoid buying mistakes. Package: 1PCS Type-C/USB-C DC Power Jack I/O Board. We are committed to providing a better shopping experience for our customers, if you have any questions, you can always contact us.
Experience flagship performance with this pre-owned ThinkPad E14 Gen 2. Driven by an 11th Gen Intel Core i7 processor, 16GB RAM, and a 512GB NVMe SSD, this 14-inch laptop delivers high-speed responsiveness and modern features like Thunderbolt 4 for the ultimate professional setup.
DELL Battery YRDD6 Laptop for replaceable Dell Inspiron 7586 5482 5485 5491 3310 2-in-1 3493 3582 3593 3793 5493 5593 5480 5590 5591 5594 5598 15 3583 3584 Vostro 3491 5481 5581 5490 5590 VM732 About this item Battery Type: 3cell Li-Polymer Voltage &Capacity : 11.4V 42WH Safeguard features against incorrect voltage, short circuit, internal overheating 100% Brand new ,Grade A cells battery; Quality assurance;every battery has passed factory testing; 500+ recharge cycles over
Logic Board 1.6GHz Core i5 (i5-5250U), 8GB RAM Replacement for (Early 2015-2017)
The 60W MagSafe 2 Power Adapter features a magnetic DC connector so if someone should trip over it, the cord disconnects harmlessly and your MacBook Pro stays put safely. It also helps prevent fraying or weakening of the cables over time. In addition, the magnetic DC helps guide the plug into the system for a quick and secure connection. The 60W MagSafe 2 Power Adapter features a magnetic DC connector so if someone should trip over it, the cord disconnects harmlessly and your MacBook Pro stays put safely. It also helps prevent fraying or weakening of the cables over time. In addition, the magnetic DC helps guide the plug into the system for a quick and secure connection. When the connection is secure, an LED located at the head of the DC connector lights up; an amber light lets you know that your notebook is charging, while a green light tells you that you have a full charge. An AC cord is provided with the adapter for maximum cord length, while the AC wall adapter (also provided) gives you an even easier and more compact way to travel. Designed to be the perfect traveling companion, the adapter has a clever design which allows the DC cable to be wound neatly around itself for easy cable storage. Compatible with MacBook Pro with 13-inch Retina display. See this article for more details about choosing the right one. Knowing which specific Mac model you have is important. If you are running OS X Lion (10.7) or later go to the “” menu at the top left of your screen, choose “About this Mac” then click the “More Info…” button. Your Mac model and generation will be displayed. If you are running an earlier version of OS X, you can enter your serial number here to find out which model you have. COMPATIBILITY Mac Models: MacBook Pro (Retina, 13-inch, Late 2012 – 2015)
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.
Acer KA222Qbi The Acer KA222Qbi entry-level series provide a superb user experience and don’t compromise . on quality. With a choice of display size and a ZeroFrame. design it is ideal for use in homes and offices. Whether it’s running productivity apps or playing games this monitor has it all. Viewable Screen Size Acer KA222Qbi 54.6 cm (21.5″) Aspect Ratio 16:9 Response Time 1 ms VRB Backlight Technology LED Horizontal Viewing Angle 178° Vertical Viewing Angle 178° Panel Technology In-plane Switching (IPS) Technology Frequency (Horizontal/Vertical) 30KHz-85KHz/48Hz-75Hz Pixel Pitch 0.25 mm Tilt Angle -5° to 15° Maximum Adjustable Height No Video Maximum Resolution 1920 x 1080 Native Contrast Ratio 1,000:1 Dynamic Contrast Ratio 100,000,000:1 Colour Supported 16.7 Million Colours Colour Depth 8-bit Color Gamut 72% NTSC Dynamic Contrast Ratio 100,000,000:1 Brightness 250 cd/m² Tearing Prevention Technology AMD FreeSync™ (HDMI VRR) Interfaces/Ports Acer KA222Qbi VGA Yes HDMI Yes Power Description Standby Power Consumption (Energy Star) 270 mW Off-Mode Power Consumption (Energy Star) 210 mW Operating Power Consumption (Energy Star) 15.50 W Miscellaneous Environmental Certification MPR II Package Contents 1 x KA222Q Widescreen LCD Monitor 1 x Power Cord(EURO/UK) 1 x VGA Cable Physical Characteristics Colour Black VESA Mount Compatible Yes VESA Mount Standard 100 x 100 Height 295 mm Width 490 mm Depth 65 mm Weight (Approximate) 3.09 kg Weight with Stand (Approximate) 3.44 kg Specifications: Specifications 21.5″ ZeroFrame FreeSync 1ms, IPS 1 year warranty
The LG 32GN650-B 32″ UltraGear Monitor delivers smooth and immersive visuals for gaming and entertainment. It features a 32-inch QHD display with crisp details and vibrant colors. Moreover, its high refresh rate ensures fluid motion during fast-paced games. 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 rooms. HDMI and DisplayPort inputs allow easy connection to gaming PCs and consoles. Furthermore, tilt adjustment helps you find 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, streamers, and home users alike. Therefore, it supports competitive gaming, media streaming, and everyday computing. 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
A1932 A2179 A1965 Battery for MacBook Air 13″ Retina (2018 2019, Early 2020) EMC 3184 3302 MRE82 MRE92 MVFH2 MWTJ2 MVH22 MVFM2 MVFK2 MREE2 MREC2 MREA2 MREF2 MUQT2 MUQU2 MacBookAir8,1 8,2 9,1 📄【Specification】Voltage: 11.4V. Capacity: 49.9Wh 4379mAh. Battery Type: Li-Polymer. Condition: Brand new, from high quality materials, top circuit boards and smart chip. 🔋【Replace Part Number】A1965 A1932(EMC 3184) A2179(EMC 3302) 3ICP4/63/119 MacBookAir8,1 MacBookAir8,2 MacBookAir9,1. 💻【Compatible Models】Only fit for MacBook Air 13″ (Model A1932 & Model A2179) Release 2018 2019 2020, fit for MRE82LL/A, MVFH2LL/A, MVFM2LL/A, MVFK2LL/A, MVFJ2LL/A, MVFN2LL/A, MVFL2LL/A, MREE2LL/A, MREC2LL/A, MREA2LL/A, MREF2LL/A, MRE92LL/A, MWTJ2LL/A, MVH22LL/A, MVH52LL/A, MVH42LL/A, MWTL2LL/A, MWTK2LL/A. Please kindly check the model number at the bottom of your laptop (A****). NOT FIT FOR MODEL A2337. 💻【ANTIEE Promise】Each products has undergone rigorous testing to ensure the correct voltage, circuit protection, stable current, low self-discharge and CE / FCC / RoHS Certified for safety. About 500 recharge cycles over the life.
A reliable, budget-friendly Genius KM-100SE wired keyboard and mouse combo featuring a spill-resistant keyboard, ergonomic design, and plug-and-play USB connectivity—ideal for home, office, or classroom use. Spill-resistant design with drainage holes to protect against accidental liquid damage Quiet, low-profile keys with standard layout (including numeric keypad) for comfortable typing Durable construction with a lifespan of up to 10 million keystrokes Integrated wrist rest for improved ergonomics during long sessions Ambidextrous 3-button design with scroll wheel 1000 DPI optical sensor for smooth, precise tracking on most surfaces Ergonomic shape for comfortable right- or left-handed use Plug-and-play USB connection—no drivers required Compatible with Windows, macOS, Linux, and ChromeOS 1.5-meter braided cable for tangle resistance and durability
The Alienware AW2723DF 27″ 280Hz Gaming Monitor is made for gamers who want smooth performance and sharp visuals. It features a 27-inch Fast IPS screen with QHD resolution (2560 x 1440) for detailed and vibrant images. With a 240Hz native refresh rate, overclockable to 280Hz via DisplayPort, it delivers incredibly fluid motion. Its 1ms response time keeps gameplay sharp, reducing blur during intense action. It supports AMD FreeSync Premium Pro and is G-SYNC compatible, helping to eliminate screen tearing and stuttering. This ensures a smooth experience across all types of games. The display offers 100% sRGB and 95% DCI-P3 color coverage, making colors rich and lifelike. It also supports HDR with 600-nit brightness, which improves contrast and light detail. For connectivity, it includes two HDMI 2.0 ports, one DisplayPort 1.4, four USB 3.2 Gen 1 ports, and audio out, giving you flexible connection options. A built-in USB hub helps manage your accessories with ease. The stand supports height, tilt, swivel, and pivot adjustments for ergonomic comfort. You can also mount it using VESA compatibility, giving you more control over your setup. Extra features include AlienFX lighting, Picture-in-Picture (PiP) and Picture-by-Picture (PbP) modes. These tools enhance your multitasking and customization. In short, the Alienware AW2723DF is a powerful gaming monitor that combines speed, color accuracy, and versatility for both competitive play and creative work. Specifications: Display : 27″ Fast IPS Resolution : QHD 2560 x 1440 Refresh Rate : 280Hz Response Time : 1ms
HP E24 G5 FHD Monitor If you’re in the market for an affordable yet high-quality monitor for your everyday computing needs, look no further than the HP E24 G5 FHD Monitor. This versatile monitor is designed to meet your requirements without breaking the bank. The HP E24 G5 features a Full High Definition (FHD) display, ensuring that you’ll enjoy sharp and vivid visuals whether you’re working on documents, streaming content, or engaging in light gaming. With its 24-inch screen size, this monitor strikes a balance between providing adequate screen real estate for multitasking and conserving desk space. It’s an ideal addition to compact workstations. Setting up the E24 G5 is a breeze, thanks to its user-friendly interface and easy connectivity options. You can swiftly connect it to your PC or laptop and start your computing tasks without any hassle. The monitor’s design is both sleek and functional, making it a practical addition to any workspace. Its compact and modern appearance easily complements your existing setup. Whether you’re a student, professional, or home user, the HP E24 G5 delivers reliable performance without straining your budget. It’s a cost-effective choice that doesn’t compromise on quality. Specifications: 23.8″ FHD (1920 x 1080 @ 75 Hz) Flat IPS with Edge-lit 1 HDMI 1.4, 1 DisplayPort™ 1.2 Tilt and Height Adjustable, Pivot, Swivel Stand, VESA Mountable On-screen controls, Anti-glare, HP Eye Ease
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
The Philips 242V8 24″ 75Hz Monitor is a great choice for home and office use. It delivers clear visuals and smooth performance. With its Full HD resolution, you can enjoy sharp and detailed images. This 24-inch monitor features a 75Hz refresh rate for fluid motion. It reduces screen tearing and stuttering, making it ideal for everyday tasks and casual gaming. The fast response time ensures smooth transitions between frames. The Philips 242V8 24″ 75Hz Monitor uses SmartContrast technology for deep blacks and bright whites. It enhances image quality, making videos and images look better. The IPS panel provides wide viewing angles with consistent colors. With Flicker-Free technology, this 75Hz monitor reduces eye strain. It also includes LowBlue Mode to minimize harmful blue light. This makes it comfortable for long hours of use. Connectivity is simple with HDMI and VGA ports. You can easily connect it to your PC, laptop, or gaming console. The setup is quick and hassle-free. The Philips 242V8 24″ 75Hz Monitor has a slim and modern design. It fits well in any workspace, whether at home or in the office. The adjustable tilt stand provides a comfortable viewing experience. This Full HD monitor is energy-efficient, helping you save on power consumption. It meets eco-friendly standards while delivering high performance. In conclusion, the Philips 242V8 24″ 75Hz Monitor is a reliable and affordable display. It offers smooth visuals, eye comfort, and a sleek design, making it a perfect choice for work and entertainment. Specifications: Display : 24″ IPS Resolution : 1920×1080 Refresh Rate : 75Hz Response Rate : 4ms Speaker : 2W x2
