A premium pre-owned HP EliteOne 800 G2 all-in-one desktop with 23.8-inch display, 6th Gen Core i7, RAM upgrade options, and SSD storage options. Designed for business professionals who need performance, security, and a clean space-saving workstation.
New A1932 A2179 A2337 DC in Power Jack Connector for Macbook Air 13" Type-C USB-C Power 821-01658-A 2018 2019 2020 Year New A1932 A2179 A2337 DC in Power Jack Connector for Macbook Air 13″ Type-C USB-C Power 821-01658-A 2018 2019 2020 Year About this item New A1932 A2179 A2337 DC Jack Power DC-in Board for MacBook Retina 13″ DC Power Jack Board We have good after-sales services. We share the latest information on laptop spare parts in the Chinese market with all our customers. This is NOT an easy job for someone with no technical skills in Disassembling or Assembling a laptop, So only purchase this item if you know how to install it. Each DC Board is tested before shipping and working.
Kingston NV3 1TB NVMe SSD — ultra-fast PCIe 4.0 storage in a compact M.2 form.• Read up to 6,000 MB/s • Write up to 4,000 MB/s • 320 TBW enduranceForm Factor: M.2 2280 | Interface: PCIe 4.0 x4 | Warranty: 5-year limitedSKU: SNV3S/1000G Full Details: The Kingston NV3 PCIe 4.0 NVMe M.2 1TB SSD gives you ultra-fast performance and reliable storage for laptops and desktops. Built with PCIe 4.0 technology, it delivers read speeds up to 6,000 MB/s and write speeds up to 4,000 MB/s, making it perfect for gaming, content creation, or simply speeding up your system. PCIe 4.0 × 4 NVMe interface for lightning-fast speed Compact M.2 2280 design for easy installation Up to 6,000 MB/s read and 4,000 MB/s write speeds 1TB capacity for games, media, and apps Low power use and heat for better efficiency Works with most modern desktops and laptops that support M.2 NVMe (PCIe) drives. Backward compatible with PCIe 3.0 systems (at lower speeds). Kingston NV3 1TB M.2 NVMe SSD Quick start/warranty guide
Genuine-spec touchpad flex cable for MacBook Pro 13″ (Model A2338, 2020, Apple M1)—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, Model A2338, Model Identifier MacBookPro17,1) with Apple M1 chip (2 Thunderbolt ports). 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 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 cable 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 cable 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 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. Important Compatibility Notes: ✅ Only for A2338 (13″, M1, 2020) ❌ Not compatible with: Intel-based A2251 / A2289 (2020) MacBook Air M1 (A2337) Any MacBook Air or 14″/16″ MacBook Pro ✅ Only for A2338 (13″, M1, 2020) ❌ Not compatible with: Intel-based A2251 / A2289 (2020) MacBook Air M1 (A2337) Any MacBook Air or 14″/16″ MacBook Pro Intel-based A2251 / A2289 (2020) MacBook Air M1 (A2337) Any MacBook Air or 14″/16″ MacBook Pro
AOC 27G4H 27-inch 200Hz gaming monitor delivers ultra-fast performance for competitive gaming. It focuses on very high refresh rate, low response time, and smooth motion clarity for esports players. Additionally, it features a 27-inch Fast IPS panel with Full HD resolution (1920 × 1080). This panel provides accurate colors and wide viewing angles, so it ensures consistent visuals during gameplay. Moreover, it supports a 200Hz refresh rate with 0.3ms MPRT response time and 1ms GtG. As a result, it delivers extremely smooth motion and reduces blur in fast-paced scenes. The monitor includes Adaptive Sync technology. Therefore, it synchronizes the display with the GPU to reduce tearing and stuttering for fluid gameplay. In addition, it supports HDR10. This improves contrast and enhances visual depth, so games appear more realistic and immersive. Furthermore, it includes gaming features such as low input lag mode, custom crosshair, and preset game modes. These features help improve reaction time and aiming precision. The design also offers ergonomic adjustments with height, tilt, swivel, and pivot support. It includes HDMI 2.0 and DisplayPort 1.4 connectivity for modern gaming setups. AOC 27G4H 27-inch 200Hz gaming monitor provides high-speed performance, precise responsiveness, and advanced gaming features for competitive and serious gamers. Specifications: 27-inch Fast IPS panel with Full HD 1920 × 1080 resolution 200Hz refresh rate for ultra-smooth competitive gaming 0.3ms MPRT and 1ms GtG response time Adaptive Sync for tear-free and stable visuals HDR10 with low input lag and gaming modes
Meetion Usb Computer 2.4GHz Wireless Mouse, Black | R545 Meetion Usb Computer 2.4GHz Wireless Mouse, Black | R545 Comfortable grip feeling. Stable Wireless. 2.4g wireless transmission technology effective working distance up to 10M. Automatic sleep power saving. AA test battery included.
The HP Omen 27″ FHD 165Hz Gaming Monitor delivers smooth, sharp visuals for gaming and everyday use. Its Full HD resolution (1920×1080) shows crisp details in games, videos, and work tasks. The 27-inch screen provides ample space for immersive gameplay or multitasking. This helps you stay focused and engaged. Moreover, the HP Omen 27″ FHD 165Hz Gaming Monitor features a fast 165 Hz refresh rate. This high refresh rate makes motion look fluid and clean on screen. Fast-paced games and action scenes appear smoother and more responsive. This reduces blur and improves reaction time during gameplay. In addition, the monitor offers a 1 ms gray-to-gray response time (with overdrive). This helps reduce ghosting and keeps fast movements clear and sharp. Your controls feel more responsive, which is ideal for competitive games. The monitor also supports adaptive sync technology to cut screen tearing and stutter. Furthermore, the HP Omen 27″ FHD 165Hz Gaming Monitor uses an IPS panel that gives wide viewing angles and good color accuracy. Colors stay consistent even when viewed from sides. This helps when you are reading, editing, or sharing your screen with others. Also, the monitor includes eye-comfort features to ease long sessions. A low-blue-light mode helps reduce eye strain during extended gaming or work hours. The anti-glare screen surface helps in bright rooms too. The design of the HP Omen 27″ FHD 165Hz Gaming Monitor is modern and clean with thin bezels. It fits well on desks of different sizes. The stand is adjustable for comfortable viewing angles, and the build feels sturdy and stable. Overall, the HP Omen 27″ FHD 165Hz Gaming Monitor combines speed, clarity, and comfort. It enhances both gaming performance and daily computing tasks. This monitor is ideal for gamers and users wanting a balanced, responsive, and reliable display. Specifications: Display : 27″ IPS Resolution : 1920×1080 Refresh Rate : 165Hz Response Time : 1ms
Keyboard for Macbook Pro A1502 ,A1582,A1493 13" Inch Retina Year 2013,2014,2015 Part no ME864 ME864LL/A ME866LL/A APN: 661-8154, 661-02361, 818-4278 Black US Layout Keyboard for Macbook Pro A1502 ,A1582,A1493 13″ Inch Retina Year 2013,2014,2015 Part no ME864 ME864LL/A ME866LL/A APN: 661-8154, 661-02361, 818-4278 Black US Layout Compatibility: FOR MB Pro Retina 13″ A1502 Late 2013: ME864LL/A (2.4 Core i5) Late 2013: ME866LL/A (2.6 Core i5) Late 2013: ME866LL/A (2.8 Core i7) Mid 2014: MGX72LL/A (2.6 Core i5) Mid 2014: MGX92LL/A (2.8 Core i5) Mid 2014: MGX92LL/A (3.0 Core i7) Early 2015: MF839LL/A (2.7 GHz Core i5) Early 2015: MF841LL/A (2.9 GHz Core i5) Early 2015: MF843LL/A (3.1 GHz Core i7) Identifying Numbers APN: 661-8154, 661-02361, 818-4278 Compatible part numbers: ME864 ME865 ME866 MF839 MF841 MF843 MGX72 MGX92 (Layout US) Related Part #: 661-8154, 661-02361, 818-4278 High Quality Laptop Keyboard. 100% Compatible with your brand.
The Riotouch 65″ Interactive Panel is designed to transform educational and professional environments with its cutting-edge features and user-friendly interface. This interactive flat panel offers a seamless blend of performance, connectivity, and intuitive design, making it an ideal choice for classrooms and conference rooms. Featuring a 65-inch 4K UHD display (3840 x 2160 resolution), the panel delivers crisp visuals and vibrant colors. Its 4mm anti-glare tempered glass ensures clear visibility from any angle, reducing eye strain during prolonged use. The panel supports up to 40-point multi-touch and 20-point multi-writing capabilities, allowing multiple users to interact simultaneously. This feature fosters collaborative learning and dynamic presentations, enhancing engagement and productivity. Powered by a quad-core Cortex-A55 processor and equipped with 4GB RAM and 32GB storage, the Riotouch panel ensures smooth performance. Its dual operating system support (Android and Windows) provides versatility, accommodating various software applications and user preferences. Connectivity is robust, with multiple ports including HDMI, USB 3.0, USB-C, VGA, and RJ45, facilitating easy integration with other devices. Built-in Wi-Fi and Bluetooth capabilities enable wireless connections, promoting a clutter-free workspace. The panel comes with integrated 2x15W front-facing speakers, delivering clear audio for multimedia presentations. Additionally, it includes a built-in 13MP 4K camera and microphone, supporting high-quality video conferencing and remote collaboration. Designed with user convenience in mind, the Riotouch panel features intuitive front controls for power, volume, and input selection. Its slim aluminum frame and wall-mountable design ensure it fits seamlessly into any environment. In summary, the Riotouch 65″ Interactive Panel combines high-resolution display, multi-touch interactivity, and versatile connectivity, making it a comprehensive solution for modern collaborative spaces. Specifications: Display : 65″ 4K UHD Touch Memory : 4GB Storage : 32GB OS : Android 11
Brand-new UK-layout keyboard replacement (Z1 Black) for MacBook Air models with M2, M3, and M4 chips (13.6″ and 15″, 2023–2025). Compatible with A2681 and A2941—precision-engineered for seamless fit and reliable typing performance. This is a brand-new, high-quality keyboard replacement designed specifically for the latest MacBook Air models featuring Apple’s M2, M3, and M4 chips (released 2023–2025). It fits both the 13.6-inch (Model A2681) and 15-inch (Model A2941) MacBook Air variants and comes in the sleek Z1 Black (Space Black) finish with a UK English layout (including the £ symbol and correct key positioning). Engineered to match Apple’s original specifications, this keyboard ensures a responsive, quiet, and comfortable typing experience with consistent key travel and tactile feedback. It includes the full top case assembly with integrated backlighting, function keys, and Touch ID sensor cutout (sensor not included), making it ideal for professional repairs or replacements after liquid damage, wear, or key failure. Installation requires technical expertise and proper tools due to the integrated nature of the MacBook Air’s top case design. Recommended for certified technicians or experienced repair professionals. Important Notes: This is a keyboard + top case assembly, not just keycaps. Touch ID sensor is not included—you must transfer your original sensor to maintain functionality. Compatible only with MacBook Air M2 (2022–2023), M3 (2023–2024), and M4 (2024–2025) models in 13.6″ (A2681) and 15″ (A2941) sizes. Color: Z1 Black (Space Black) – matches official Apple Space Black finish. Layout: UK English (ISO) – features the correct “£” key and shifted Enter key.
In the world of monitors, the ViewSonic VA2223-H stands out as a reliable and clear solution, offering a perfect blend of visual excellence and simplicity for an enhanced viewing experience. Transitioning to its key features, the VA2223-H excels in providing clear and crisp visuals. This monitor is designed to deliver sharp and vibrant images, ensuring a visually engaging experience for work or entertainment. Moreover, this display impresses with its sleek and minimalistic design. The ViewSonic VA2223-H not only enhances the aesthetics of your workspace but also ensures straightforward setup, making it an ideal choice for users seeking simplicity. In addition to its functionality, the VA2223-H offers user-friendly controls and versatile connectivity options, ensuring a hassle-free experience. This monitor seamlessly adapts to various settings, providing flexibility for different viewing preferences. Furthermore, ViewSonic’s commitment to user satisfaction is evident in the VA2223-H’s energy-efficient design and eye-care technology. It’s a reliable companion for extended viewing periods without compromising on visual quality. In conclusion, the ViewSonic VA2223-H redefines clarity and simplicity, combining clear visuals, sleek design, and user-friendly features. Elevate your viewing experience effortlessly with the VA2223-H – your clear and straightforward solution for visual excellence! Specifications HDMI and VGA input 60Hz Refresh Rate Superior color rendering options Comfortable viewing Low energy consumption VESA mountable 1 Year Warranty
The BYL-2207 2-in-1 LAN adapter provides fast and stable wired internet through a Gigabit Ethernet port using either USB-C or USB 3.0. Perfect for laptops, MacBooks, and PCs without an Ethernet port, it ensures smooth streaming, online meetings, and reliable network performance. The BYL-2207 2-in-1 Type-C / USB 3.0 to Gigabit LAN Adapter is designed for users who need a reliable wired connection on modern laptops and devices. It supports both USB-C and USB 3.0, making it compatible with a wide range of systems including MacBooks, ultrabooks, and desktops. With Gigabit Ethernet speed, it provides faster and more stable internet compared to Wi-Fi, making it ideal for work, gaming, and streaming. 2-in-1 Connector (USB-C + USB 3.0) for wide compatibility Gigabit Ethernet Port (RJ45) for fast and stable wired internet High-Speed Performance supports up to 1000Mbps network speed Plug & Play installation on most systems Compact & Portable Design easy to carry anywhere Ideal for Work & Streaming improves stability for meetings and downloads Reliable Connection reduces lag compared to Wi-Fi Ideal for MacBooks, laptops, ultrabooks, desktops, and tablets that need a stable wired internet connection. Perfect for online meetings, remote work, gaming, IPTV, streaming, and downloading.
WIWU Alpha Double Layer Sleeve Bag For 16\14″ Laptop/MacBook Brand: WIWU The corner patent design protects your laptop from bumps and drops in potential accident. SBS water resistance zipper Retractable waterproof TPU handle, firm and scratch resistant (commonly used in car trailer ropes) 2 compartment zipper design, organize your accessories well Water-resistant material
Material: Plastic + Mesh fabric Bluetooth version/chipset: 5.4/ATS2853 Transmission Distance: 12M Working voltage: 18.5V Impedance: 4Ω Speaker power: Tweeter: 50W * 2 Subwoofer: 200W Battery (mAh):30000mAH/18.5V*6000;18650/2000mA*15; 3 in series and 5 in parallel Charging time: about 3 hours Calling: 20 hours Music playback: 12 hours Standby time: 6 months 1.5.4 wireless, fast, stable, and efficient connection, excellent sound quality 2 . Sound Card/Karaoke/wireless speaker, all in one, built-in DSP, multiple EQ settings, support internal monitoring/recording/live streaming function, 433/360° omnidirectional remote control (can work through walls) 3. Efficient speakers and power amplifier for loud sound and high-fidelity music playback 4,30000mAh power bank (18.5V*6000mAh; 18650/2000mA*15; 3 in series and 5 in parallel), colorful lights available in various modes, controllable flashing lights CTN GW: 18.5kg ± 0.2kg Carton size: 50.5 * 44.2 * 39cm
MacBook Pro A1708 Battery A1713 for MacBook Pro 13 Inch A1708 Late 2016 Mid 2017 (EMC 2978 3164), A2171 Laptop Replacement Battery for MacBook Pro 13 Inch A2159 (2019) A2289 (2020) A2338 (2020) 【Macbook pro 13 Inch battery A1713 & A2171 Battery Specification】– Voltage: 11.4V. Capacity: 54.5Wh / 4781mAh, Battery Type: Li-ion 【Newest 4.0 upgraded OEM Battery for Apple macbook pro】– Japan High Performance Electric Core. Cobalt Proportion: >98%. Upgrade chip. Up to 1500+ recharge cycles over the life of the battery. Overcharger and Discharger Circuit Protection, Ensure fast charges and low power consumption, UL-/CE-/FCC-/RoHS-Certified for safety 【Replacement Battery A1713 for A1708 Macbook pro 13 inch】– A1708 Macbook pro 13” Late 2016: MacBook Pro 13-Inch “Core i5” 2.0 & MacBook Pro 13-Inch “Core i7” 2.4 (MacBookPro13,1, EMC2978, MLL42xx/A, MLUQ2xx/A). — A1708 Macbook pro 13” Mid 2017: MacBook Pro 13-Inch “Core i5” 2.3 & MacBook Pro 13-Inch “Core i7” 2.5 (MacBookPro14,1, EMC3164, MPXQ2xx/A, MPXR2xx/A, MPXT2xx/A, MPXU2xx/A) 【Replacement Battery A2171 for A2159 & A2289 & A2338 Macbook pro 13 inch】– A2159 Macbook pro 13” 2019: MacBook Pro 13-Inch “Core i5” 1.4 Touch & “Core i7” 1.7 Touch (MacBookPro15,4, EMC3301, MUHN2xx/A, MUHP2xx/A, MUHQ2xx/A, MUHR2xx/A, MUHR2xx/B). — A2289 Year 2020: MacBook Pro 13-Inch “Core i5” 1.4 & “Core i7” 1.7 (MacBookPro16,3, EMC 3456, MXK32xx/A, MXK52xx/A, MXK62xx/A, MXK72xx/A). — A2338 Year 2020: MacBook Pro 13-Inch “M1” 8-Core 3.2 (MacBookPro17,1, EMC3578, MYDA2LL/A*)
The LG 32UR500K-B 32 Inch Monitor delivers large-screen clarity and detailed visuals for work, entertainment, and everyday computing. Its spacious 32-inch display provides an immersive viewing experience, making it ideal for productivity, content consumption, and multitasking. Moreover, the high-resolution panel ensures sharp images and vibrant colors, allowing users to enjoy clear visuals across various applications. This monitor offers wide viewing angles and accurate color reproduction, making it suitable for office tasks, media editing, and home entertainment. Additionally, the sleek and modern design fits easily into professional or home setups while maximizing desk space efficiency. The large screen size also allows users to work with multiple windows comfortably without constant switching. The LG 32UR500K-B includes multiple connectivity options, making it easy to connect PCs, laptops, and consoles. Furthermore, ergonomic tilt adjustments allow comfortable viewing during long work or entertainment sessions. Therefore, it is perfect for professionals, students, and home users seeking performance and comfort. Finally, it combines large-screen immersion, clarity, and modern design for everyday use. Specifications: 32-inch monitor for work and entertainment High-resolution display for clear visuals Wide viewing angles and accurate colors Multiple connectivity options Sleek and modern design
Ready to take your gaming setup to the next level? Look no further than the ViewSonic 32” 75Hz FHD Monitor VA3209-MH. This monitor offers a perfect blend of performance and immersion for gamers. With a generous 32-inch display, immerse yourself in stunning Full HD visuals. Every detail pops with clarity and vibrancy, bringing your favorite games to life in vivid color. Transitioning to performance, the VA3209-MH boasts a smooth 75Hz refresh rate, ensuring fluid motion and reduced motion blur during fast-paced gaming action. Say goodbye to screen tearing and hello to seamless gameplay. Moreover, this monitor features built-in speakers, eliminating the need for external audio devices. Immerse yourself in crystal-clear sound as you explore virtual worlds and engage in epic battles. The ViewSonic 32” 75Hz FHD Monitor VA3209-MH is designed with your comfort in mind. Its ergonomic stand allows for customizable tilt adjustments, ensuring optimal viewing angles for extended gaming sessions. In addition, connectivity options such as HDMI and VGA ports offer versatile compatibility with various gaming consoles and devices. Switch between platforms seamlessly and enjoy your favorite games without limitations. In conclusion, the ViewSonic 32” FHD Monitor VA3209-MH is a game-changer for gamers seeking immersive experiences. With its stunning visuals, smooth performance, and built-in speakers, it delivers everything you need for an unforgettable gaming journey. Upgrade your setup today and elevate your gaming to new heights. Specifications: Display : 32″ IPS Resolution : FHD(1920×1080) Refresh Rate : 75Hz Response Rate : 4ms
RAM CRUCIAL 8GB 2666 DDR4 NOTEBOOK About this item Improve your system’s responsiveness, run apps faster and multitask with ease Good Quality with a high end Crucial RAM CB8GS2666 8GB DDR4 2666 MHz Laptop Memory Easy to use
LG 35 inch Curved UltraWide QHD Monitor 35WN65C-B is built for multitasking, productivity, and immersive viewing. It features a 35-inch curved VA display with UltraWide QHD resolution for a wider workspace. Additionally, it supports HDR10 and sRGB 99% color coverage. Therefore, it works well for office tasks, content creation, and entertainment use. The LG 35 inch Curved UltraWide QHD Monitor 35WN65C-B delivers 3440 x 1440 resolution with a 100Hz refresh rate and 5ms response time. Moreover, it includes AMD FreeSync support for smoother visuals during fast-moving content. The monitor provides USB Type-C, two HDMI ports, one DisplayPort, and headphone out for flexible connectivity. In addition, the stand supports height and tilt adjustment for better comfort during long sessions. Furthermore, the curved screen improves immersion while the UltraWide format helps users manage multiple windows at once. As a result, it improves workflow and viewing comfort in both work and entertainment setups. It also supports VESA wall mounting for flexible desk arrangement. Specifications: 35-inch curved VA UltraWide QHD display 3440 x 1440 resolution with 100Hz refresh rate HDR10 support with sRGB 99% color coverage USB Type-C, HDMI, and DisplayPort connectivity Height and tilt adjustable stand
The Acer V246HQL 24″ 60Hz Monitor is a perfect choice for work, study, and entertainment. It delivers clear visuals with a full HD resolution. The 24-inch screen provides a comfortable viewing experience for long hours. With a 60Hz refresh rate, this monitor ensures smooth performance for daily tasks. It is great for browsing, office work, and watching videos. The 5ms response time reduces motion blur, making images sharper. The Acer V246HQL features LED-backlit technology, offering bright and vivid colors. It enhances contrast and clarity for a better viewing experience. The anti-glare screen minimizes reflections, making it easy on the eyes. This 24-inch monitor supports Full HD 1920 x 1080 resolution. It delivers sharp images with great detail. Whether for work or entertainment, this resolution ensures high-quality visuals. The Acer V246HQL 24″ 60Hz Monitor includes VGA and HDMI ports for flexible connectivity. You can easily connect it to computers, laptops, and other devices. The tiltable stand allows you to adjust the screen for better comfort. Designed for efficiency, this monitor has low power consumption. It is Energy Star certified, helping to reduce electricity costs. It is an eco-friendly choice for home and office use. The Acer V246HQL 24″ 60Hz Monitor is built with eye-care technology. It includes Flicker-Free and Blue Light Filter features. These help reduce eye strain during long hours of use. Its slim and modern design makes it a great addition to any workspace. It fits easily on desks, saving space while providing a high-quality display. In conclusion, the Acer V246HQL 24″ 60Hz Monitor is a reliable and budget-friendly option. It offers excellent performance for everyday tasks with clear visuals and comfortable viewing. Specifications: Display : 24″ VA Resolution : 1920×1080 Refresh Rate : 60Hz Response Rate : 5ms
