Genuine Apple MacBook Pro 16″ (A2141) Retina display assembly—professionally removed from original units and tested for full functionality. Ideal for high-quality repairs with true OEM performance and clarity. Model Compatibility: Fits MacBook Pro 16-inch (2019 model, A2141) only. 100% Original Apple Display: Not a copy or aftermarket part—this is an authentic Apple Retina display assembly carefully pulled from used or refurbished MacBook Pro units. Stunning Retina Display: 16-inch LED-backlit screen with 3072 x 1920 resolution, P3 wide color, True Tone technology, and high brightness for crisp, lifelike visuals. Complete Assembly Included: Comes with front glass, LCD panel, integrated 720p FaceTime HD camera, ambient light sensor, and full bezel—ready for installation. Rigorously Inspected: Each unit is tested for dead pixels, backlight uniformity, color accuracy, and physical condition to ensure reliable performance. “Pulled” Condition: Removed from a genuine MacBook Pro—fully functional with OEM quality, but shows signs of prior use (no cracks or major blemishes). Perfect for Professional Repairs: Trusted by technicians and refurbishers who demand factory-level display quality and compatibility.
Genuine-spec touchpad flex cable for MacBook Pro 13″ (Model A2251, 2020, 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 13-inch (2020, Two Thunderbolt Ports, Model A2251, Model Identifier MacBookPro16,1) with Intel Core i5/i7 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: Precise touch coordinates Force Touch pressure data Haptic feedback signals to the Taptic Engine Enables full macOS gesture support including Force Click, three-finger lookup, swipe navigation, and inertial scrolling. Precise touch coordinates Force Touch pressure data Haptic feedback signals to the Taptic Engine Enables full macOS gesture support including Force Click, three-finger lookup, swipe navigation, and inertial scrolling. OEM-Quality Build: Matches Apple’s original specifications in: Cable length and routing Connector pitch and ZIF latch design EMI shielding and flex durability Cable length and routing Connector pitch and ZIF latch design EMI shielding and flex durability Common Use Cases: Replacing a torn, creased, or liquid-damaged original flex Completing a trackpad replacement when the original cable is compromised Fixing intermittent trackpad behavior, loss of Force Touch, or complete unresponsiveness Replacing a torn, creased, or liquid-damaged original flex Completing a trackpad replacement when the original cable is compromised Fixing intermittent trackpad behavior, loss of Force Touch, or complete unresponsiveness Installation Note: Requires full bottom case removal and partial disassembly (including battery disconnect). Cable routes under the right speaker and logic board—must be seated in original retention channels. Connects via ZIF (Zero Insertion Force) socket—align carefully and latch gently. Recommended for experienced or certified technicians only. Requires full bottom case removal and partial disassembly (including battery disconnect). Cable routes under the right speaker and logic board—must be seated in original retention channels. Connects via ZIF (Zero Insertion Force) socket—align carefully and latch gently. Recommended for experienced or certified technicians only.
WiWU A821CH 8‑in‑1 Stand & Dock – A foldable aluminum laptop stand with a built-in 8‑port USB‑C dock (two USB‑A, two USB‑C, HDMI 4K30, SD/TF, Gigabit Ethernet, PD 100 W).Enhances comfort, cooling, and functionality—perfect for decluttered, professional work setups. Model: WiWU A821CH Design: Sturdy aluminum alloy stand with foldable, portable design, hollow surface for cooling, and silicone pads to prevent slips Dimensions & Weight: Compact when folded (~400 g in aluminum) Docking Hub Ports: 2 × USB-C ports 2 × USB‑A 3.0 ports 1 × HDMI (up to 4K@30 Hz) SD + micro‑SD card slots 1 × RJ‑45 Gigabit Ethernet (1000 Mbps) Docking Hub Ports: 2 × USB-C ports 2 × USB‑A 3.0 ports 1 × HDMI (up to 4K@30 Hz) SD + micro‑SD card slots 1 × RJ‑45 Gigabit Ethernet (1000 Mbps) Power Delivery: USB-C PD 3.0 supports up to 100 W—can charge a laptop while using other ports Connectivity: HDMI supports up to 4K@30 Hz; Ethernet up to Gigabit speed Stand Features: Detachable base—can use stand and hub together or separately, with adjustable ergonomic angles and vents for airflow Durability: Aluminum alloy with frosted texture, scratch-resistant finish, tested to executive standards
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
VSTAR UA150 1500VA UPS | Simulated Sine Wave Output | 230V | 24VDC Battery System | 50/60Hz Auto Sensing | Compact Design | Black Color | Model UPS-UA150 Robust 1500VA Power CapacityThe VSTAR UA150 delivers 1500VA of reliable backup power to safeguard your essential electronics, including PCs, servers, routers, and security systems. Dual Voltage CompatibilitySupports 110/120V or 220/230/240V input, making it ideal for use in a variety of international voltage environments. Stable 230V Output with AVR FunctionalityMaintains a consistent 230VAC output, protecting connected devices from voltage fluctuations and surges. Simulated Sine Wave OutputProvides a simulated sine wave waveform suitable for most common electronics, especially during normal backup operations. Auto-Sensing FrequencyAutomatically detects 50Hz or 60Hz power sources, adapting to your electrical environment without manual adjustments. Compact, Space-Saving DesignMeasuring just 353 x 149.3 x 162 mm, the UA150 fits neatly on or under desks, in server cabinets, or against walls. Reliable 24VDC Battery SystemOperates on a 24VDC internal battery configuration, delivering longer runtimes and better reliability during outages. Universal Output SocketsEquipped with IEC-style or universal output sockets that are compatible with a wide range of devices. Sleek Black FinishA clean and modern black color allows it to blend seamlessly into professional or home environments. Ideal for Home or OfficeProtects critical electronics, telecom gear, and POS systems from data loss and downtime.
Samsung S24D300 24″ Essential S3 Monitor offers a 24‑inch Full HD (1920 × 1080) IPS display for clear and detailed visuals. Additionally, it provides a smooth experience with up to 100 Hz refresh rate, which can show motion more fluidly than standard 60 Hz panels. The flat screen and simple design make it suitable for home, study, or office use. Moreover, it includes Eye Saver Mode and Flicker Free technology to help reduce eye strain during long sessions. Therefore, users can stay comfortable while working, browsing, or watching content. The monitor provides basic connectivity options with HDMI and VGA ports. Furthermore, its slim bezel enhances a modern setup and fits well with other devices. In addition, the tilt‑adjustable stand allows users to set a comfortable viewing angle. Samsung backs the product with a three‑year warranty for added peace of mind. Specifications: Display : 24″ IPS Resolution : 1920 x 1080 FHD Refresh Rate : 100Hz Response Rate : 5ms
The 45W MagSafe 2 Power Adapter features a magnetic DC connector so if someone should trip over it, the cord disconnects harmlessly and your MacBook Air 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 45W MagSafe 2 Power Adapter features a magnetic DC connector so if someone should trip over it, the cord disconnects harmlessly and your MacBook Air 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. This power adapter recharges the lithium polymer battery while the system is off, on, or in sleep mode. It also powers the system if you choose to operate without a battery. Compatible only with MacBook Air featuring MagSafe 2 power port. 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. Mac Models MacBook Air (13-inch, Early 2015 – 2017) MacBook Air (11-inch, Early 2015)
OEM-quality trackpad replacement (without flex cable) for MacBook Air 13″ (Model A1932, 2018–2019) in Gold finish—engineered for precise Force Touch response, smooth multi-touch gestures, and perfect color-matched integration with the original chassis. Compatible With: MacBook Air 13-inch (2018 & 2019, Model A1932, Model Identifiers MacBookAir8,1) with Intel Core i5/i7 processors. 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: Gold—specifically matched to the Gold variant of the A1932 MacBook Air for seamless 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, Look Up, pressure-sensitive navigation). Precision Build: Smooth glass surface with exact curvature, texture, and micro-click mechanism matching Apple’s original design for 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 integrity and sensor alignment. Recommended for professional or experienced repair technicians only.
The LG UltraGear 27″ 180Hz Curved Monitor is built for gamers who demand smooth visuals and immersive experiences. Its 27-inch curved screen pulls you into the action with an engaging field of view. With a 180Hz refresh rate, this monitor delivers ultra-smooth motion, reducing blur during fast-paced gameplay. The LG UltraGear 27″ 180Hz Curved Monitor also supports high resolution for sharp details and vibrant visuals. Its curved design enhances immersion, making games, movies, and work tasks more enjoyable. The IPS panel ensures accurate colors and wide viewing angles for consistent quality. Additionally, the LG UltraGear 27″ 180Hz Curved Monitor includes AMD FreeSync and NVIDIA G-SYNC compatibility. This reduces tearing and stuttering, ensuring smoother gaming performance. Its low response time allows quick reactions, giving competitive players a clear advantage. With HDR support, the monitor delivers better brightness and contrast for lifelike imagery. The LG UltraGear 27″ 180Hz Curved Monitor also provides multiple connectivity options, including HDMI and DisplayPort. Its ergonomic stand offers height, tilt, and swivel adjustments for comfortable viewing. The slim bezel design gives it a modern look and maximizes screen space. Built-in gaming features like Crosshair and Black Stabilizer improve accuracy and visibility in competitive titles. The LG UltraGear 27″ 180Hz Curved Monitor is not only stylish but also reliable for long hours of use. It is ideal for gamers, streamers, and anyone who values speed and immersion. Ultimately, this monitor offers a perfect balance of performance, design, and comfort. Specifications: Display : 27″ VA Resolution : QHD (2560 x 1440) Refresh Rate : 180Hz Response Rate : 1ms GTG Curvature : 1000R
Huawei IdeaHub Board 2 86-inch display delivers an immersive teaching and collaboration experience with large 4K visuals. It helps teachers present clearly and engage students effectively. As a result, classrooms benefit from better interaction and visibility. The 86-inch screen features 4K UHD resolution with zero-gap laminated glass. Therefore, it reduces reflection and improves clarity. Moreover, the D-LED backlight and 60Hz refresh rate ensure stable and consistent visuals. It supports up to 20 touch points using infrared multi-touch technology. In addition, smart handwriting recognition and annotation allow natural writing. The low latency writing response improves accuracy during lessons. The system includes a quad-core processor with 4GB RAM and 32GB storage. Consequently, it runs applications smoothly. It supports Android, Windows, iOS, and macOS for flexible integration. It also includes key capabilities such as 4K UHD resolution, multi-touch interaction, smart annotation tools, wide connectivity options, and cross-platform support. Huawei IdeaHub Board 2 86-inch display is built to enhance collaboration and simplify teaching. Specifications: 86-inch 4K UHD display with 3840 × 2160 resolution Supports up to 20 touch points with infrared technology Zero-gap laminated glass with D-LED backlight Low latency writing with smart annotation support Quad-core CPU with 4GB RAM and 32GB storage
Genuine-spec keyboard replacement for MacBook Pro 13″ (Model A2289, 2020) — available in US QWERTY or UK QWERTY (with £ symbol). Features Apple’s scissor-switch Magic Keyboard, backlighting, and OEM-fit design for reliable performance and seamless installation. Compatible With: MacBook Pro 13-inch (2020, Four Thunderbolt Ports, Model A2289, Model Identifier MacBookPro16,2) with Intel Core i5/i7 processors. Layout Options (select at purchase): US Layout: Standard QWERTY with wide Enter key, @ above 2, and # above 3. UK Layout: QWERTY with £ symbol, tall vertical Enter key, @ on right Alt, and UK-specific punctuation. US Layout: Standard QWERTY with wide Enter key, @ above 2, and # above 3. UK Layout: QWERTY with £ symbol, tall vertical Enter key, @ on right Alt, and UK-specific punctuation. Keyboard Type: Apple’s Magic Keyboard with scissor-switch mechanism—quieter, more stable, and more durable than earlier Butterfly designs. Integrated Features: Full backlighting for low-light use Ambient light sensor compatibility OEM-style flex cable pre-attached for direct logic board connection Full backlighting for low-light use Ambient light sensor compatibility OEM-style flex cable pre-attached for direct logic board connection Build & Fit: Engineered to exact Apple specifications—ensures perfect alignment, consistent key height, and flush integration into the original top case. Installation Note: Keyboard is glued into the top case and requires full disassembly, careful adhesive removal, and professional re-adhesion. Recommended for experienced or certified technicians only.
The Apple MacBook Pro 16-inch (2019) is powered by an Intel Core i9 processor, paired with 16GB RAM and a fast 512GB SSD for powerful and reliable performance. Designed for professionals and creatives, it features a premium aluminum build, immersive 16-inch Retina display, and dedicated Radeon Pro graphics for demanding workloads.
The Samsung 55″ Neo QLED QN85F 4K Vision AI Smart TV QA55QN85FAUXTW delivers a premium viewing experience with advanced Neo QLED display technology and intelligent AI processing. 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 for better output. Therefore, the TV consistently delivers optimized visuals without manual settings. In addition, AI upscaling improves lower-resolution content closer to 4K quality. 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 between apps. In addition, the slim design with thin bezels gives the TV a modern and premium look. 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 and detailed picture quality 55-inch 4K display provides immersive viewing experience Vision AI enhances picture and sound automatically HDR improves contrast, brightness, and color depth Smart TV platform supports apps, streaming, and smart features
The ViewSonic VX3216-2KC-PRO-3 31.5″ 2K 240Hz Curved Gaming Monitor delivers smooth and sharp visuals for fast gaming. Its 2K resolution shows clear detail in games, videos, and creative work. The large 31.5-inch curved screen improves immersion and focus. This helps you feel closer to the action. Moreover, the ViewSonic VX3216-2KC-PRO-3 31.5″ 2K 240Hz Curved Gaming Monitor features a powerful 240 Hz refresh rate. This makes motion extremely smooth during fast scenes. As a result, gameplay looks fluid with less blur. This gives you a competitive edge in fast games. In addition, the monitor offers a very fast response time for quick screen changes. This reduces ghosting and keeps motion sharp. Controls feel more precise and responsive. This helps improve gaming accuracy. Furthermore, the ViewSonic VX3216-2KC-PRO-3 31.5″ 2K 240Hz Curved Gaming Monitor uses a high-contrast VA panel. Blacks appear deep and colors look rich. This makes games and movies more enjoyable. The curved design also improves side viewing comfort. Also, the monitor supports adaptive sync to reduce screen tearing and stuttering. This keeps frames smooth when your system speed changes. As a result, gameplay feels stable and clean. This enhances the overall gaming experience. In addition, the monitor includes modern connection options. It offers DisplayPort and HDMI for easy device setup. You can connect gaming PCs, consoles, and media devices with ease. This adds strong flexibility. Moreover, the stand offers tilt adjustment for viewing comfort. The slim design saves desk space while keeping a bold gaming look. The monitor also supports wall mounting for clean setups. Overall, the ViewSonic VX3216-2KC-PRO-3 31.5″ 2K 240Hz Curved Gaming Monitor delivers speed, clarity, and immersion in one strong display. It improves gaming performance and visual comfort. This monitor is ideal for gamers who want smooth action and large curved visuals. Specifications: Display : 31.5″ Fast VA Resolution : QHD 2560 x 1440 Refresh Rate : 240Hz Response Time : 1ms Curved
LG UHD 4K 27″ Standing screen display size 27 Inches Screen Resolution 3840 x 2160 Max Screen Resolution 3840 x 2160 Pixels Brand LG Series 27UL500-W Item model number 27UL500-W Item Weight 11.2 pounds Product Dimensions 8.2 x 24.5 x 18.1 inches Item Dimensions LxWxH 8.2 x 24.5 x 18.1 inches Color White Power Source AC Manufacturer LG Language English ASIN B07PGL2WVS Country of Origin China Date First Available March 1, 2019 MONITOR RESOLUTION: 3840×2160 SIZE: 27″ MONITOR REFRESH RATE: 60Hz SYNC: Free-Sync CONNECTOR TYPE: HDMI CONNECTOR TYPE: DisplayPort LG UHD 4K 27″ n-Plane Switching (IPS) Panel. HDMI | DisplayPort Inputs. 3840 x 2160 4K UHD Resolution. 1000:1 Static Contrast Ratio. 300 cd/m² Brightness. 178°/178° Viewing Angles. 5 ms Response Time (GtG) 1.07 Billion Colors. Brand LG Screen Size 27 inch Resolution 3840 x 2160 pixels Display Technology IPS Screen Surface Matte Refresh Rate 60 Hz Response Time 5 ms Viewing Angle 178° Brightness 300 cd/m2 Contrast Ratio 1000:1 Connectivity HDMIDisplay Port Device Dimensions (WxHxD) 24.5 x 18.1 x 8.2 inch Features FreesyncHeadphone OutVesa Mountable Weight 11.3 pounds This IPS computer monitor helps keep colors consistent at a wide viewing angle while reproducing 98 percent coverage of the sRGB color spectrum. Color Calibration helps maintain accurate color on the screen and prevents gradual changes. For More Information Click Here For More LG Monitors Click Here Specifications: LG UHD 4K 27″ Standing screen display size 27 Inches Screen Resolution 3840 x 2160 Max Screen Resolution 3840 x 2160 Pixels Brand LG Series 27UL500-W Item model number 27UL500-W 1 Year Warranty Manufacturer link
Original 13.3-inch LCD display assembly for MacBook Air A1466, pulled from a working unit. OEM, drop-in replacement for cracked or nonfunctional screens—ideal for restoring perfect visuals. This is a genuine Apple LCD display assembly for the MacBook Air model A1466 (mid-2013 to ~2017). It was removed from a working machine (“pulled”) and tested. It’s intended to replace failed, cracked, or damaged screens with an OEM original part. Key Features & Functionality Factory original LCD panel with LED backlight Includes glass, mounting frame, hinges, display cable Calibrated by Apple for color accuracy, brightness, contrast Tested for display quality, backlight uniformity, dead or stuck pixels Fits directly in A1466 models with correct alignment and cable interface Specifications Important Notes & Caveats Must ensure your MacBook is A1466 — wrong model = mismatch in frame, mounting, cable. As a used component, there may be light cosmetic wear or micro-scratches. Always test before full installation (connect the cable, boot, check display and backlight). Be careful handling: glass is fragile and the flex cable is delicate. Alignment and screw placement are critical — incorrect installation can damage the new screen.
The Apple 240W USB-C Charge Cable (2 m) is a durable, braided USB-C to USB-C cable that supports fast charging up to 240W and USB 2.0 data transfer—ideal for powering high-performance MacBooks and other USB-C devices. Length: 2 meters Connector: USB-C to USB-C Power Support: Up to 240W (48V/5A), compatible with the new USB-C PD 3.1 Extended Power Range standard Data Transfer: USB 2.0 speeds (up to 480 Mbps) — this cable prioritizes power delivery over high-speed data Ideal for charging MacBook Pro (2021 and later), MacBook Air (M2 and later), and other high-power laptops Backward-compatible with lower-wattage devices (iPad, iPhone 15 lineup, etc.) Works with any USB-C power adapter, but you’ll only get full 240W output when paired with a compatible high-wattage charger The standard USB-C Charge Cable (2 m, 60W/100W) only supports up to 100W. The Thunderbolt 4 Pro Cable (3 m) supports high-speed data (40 Gb/s) and video output, but maxes at 100W charging. This 240W version is the one to get if your priority is maximum charging power rather than data/video.
A space-saving pre-owned Lenovo ThinkCentre M920z all-in-one desktop with 24-inch display, 8th Gen Core i5, RAM upgrade options, and SSD storage options. Ideal for offices, education, and home use with clean design and reliable performance.
Reliability meets value in this pre-owned ThinkPad E14 Gen 2. Equipped with the AMD Ryzen 5 4500U 6-core processor, 8GB RAM, and a 512GB NVMe SSD, this laptop is built for students and professionals who need a durable, high-performance machine for everyday multitasking.
The MSI MAG 255XF 24.5″ 300Hz Gaming Monitor is built for speed and precision. It is designed for competitive gamers who need lightning-fast response times. This gaming monitor features a 24.5-inch Full HD IPS panel. It delivers vibrant colors and sharp visuals for an immersive gaming experience. The wide viewing angles ensure consistent picture quality from any position. With a 300Hz refresh rate, this monitor provides ultra-smooth gameplay. Fast-moving scenes appear clear, reducing motion blur and screen tearing. This is perfect for FPS, racing, and esports titles. The 1ms GTG response time minimizes input lag. Every action you make is reflected instantly on the screen. This gives gamers a competitive edge in high-speed games. The MSI MAG 255XF 24.5″ 300Hz Gaming Monitor supports Adaptive Sync technology. It eliminates screen tearing and stuttering, ensuring fluid visuals. This makes every game feel smoother and more responsive. It also features Night Vision technology to enhance dark scenes. You can spot enemies and details clearly, even in low-light gaming environments. The ergonomic design allows tilt, swivel, height, and pivot adjustments. You can set up your monitor for maximum comfort during long gaming sessions. The slim bezels create a modern and sleek look. Connectivity options include DisplayPort and HDMI for seamless device compatibility. The monitor also features USB ports for added convenience. For eye comfort, the anti-flicker and low blue light technology reduce strain. You can enjoy long hours of gaming without discomfort. In conclusion, the MSI MAG 255XF 24.5″ 300Hz Gaming Monitor is the perfect choice for serious gamers. Its high refresh rate, fast response time, and vibrant display make it a top-tier gaming monitor. Specifications: Display : 24.5″ Rapid IPS Resolution : 1920×1080 FHD Refresh Rate : 300Hz Response Rate : 0.5ms
