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 Lenovo ThinkVision T24‑40 24‑inch monitor offers clear and sharp Full HD visuals that improve everyday work and multimedia tasks. As a result, text, spreadsheets, and videos appear crisp and easy to view. In addition, the IPS panel provides wide viewing angles, so colors remain consistent even when you shift your position. Furthermore, this monitor includes features that help reduce eye strain during long sessions, making it suitable for office work, study, or creative tasks. It also offers flexible connectivity options that allow you to connect laptops and desktops without extra adapters. Therefore, it fits well into both professional and home environments. Overall, the Lenovo ThinkVision T24‑40 delivers dependable display quality and practical features, making it a great choice for users seeking a reliable 24‑inch monitor. Specifications: 24″ Full HD IPS display for crisp visuals Wide viewing angles for consistent colors Eye comfort features for long sessions Flexible connectivity for multiple devices Reliable performance for work and home use
The Logitech G515 Lightspeed TKL Wireless Gaming Keyboard is crafted for serious gamers who demand the best in performance and design. Whether you’re into fast-paced action games or strategic battles, this keyboard delivers precision and speed. Featuring Lightspeed wireless technology, the Logitech G515 offers ultra-fast response times, ensuring every keystroke registers instantly. This means you can enjoy lag-free gaming, giving you the competitive edge you need. The TKL (Tenkeyless) design of the Logitech G515 Lightspeed allows for a more compact setup, giving you extra room for your mouse movements. This makes it perfect for gamers who value space and portability without compromising performance. Customizable RGB lighting lets you personalize your gaming setup. With Logitech G HUB software, you can choose from a wide range of colors and effects, syncing them with your in-game actions for an immersive experience. With a battery life of up to 36 hours on a single charge, you can game uninterrupted. When it’s time to recharge, the USB-C connection ensures fast and efficient charging, so you’re back in action quickly. In conclusion, the Logitech G515 Lightspeed TKL Wireless Gaming Keyboard is the ultimate tool for gamers seeking top performance, customization, and portability. Elevate your gaming setup with the G515 today and experience the difference. Specifications: Switch : Low-profile Key Rechargeable Lithium Polymer Battery Battery Life : 36h Weight : 880g Connection : Wired, Wireless Part Number : 920-012423
Philips 27E1N1800A is a 27-inch 4K Ultra HD IPS monitor designed for sharp image clarity and wide viewing angles. It delivers a 3840 × 2160 resolution with IPS technology for consistent color performance and detailed visuals. Additionally, it supports HDR for improved brightness and contrast in compatible content. Moreover, Adaptive Sync helps reduce screen tearing for smoother visuals. It also includes Flicker-Free technology and LowBlue Mode to improve eye comfort during long use. Built-in SmartImage optimizes display settings based on content type for better viewing experience. The Philips 27E1N1800A monitor provides crisp 4K IPS clarity for productivity, media, and general everyday use. Specifications: 27-inch IPS panel with 4K Ultra HD 3840 × 2160 resolution HDR support for enhanced contrast and brightness Adaptive Sync for smoother visuals with reduced tearing Flicker-Free technology for reduced eye strain LowBlue Mode for improved viewing comfort
WIWU Alpha tech pouch 1.Designed for Mac book accessories 2.Exquisite internal storage space, neat and tidy, get rid of clutter 3.Durable YKK water resistance zipper
HP P24v G5 Monitor Overview The HP P24v G5 is a 24-inch Full HD monitor designed for everyday work. It delivers clear visuals and reliable performance. As a result, it suits offices, home setups, and study spaces. 24-Inch Full HD Display This monitor features a 24-inch Full HD resolution. Therefore, text appears sharp and easy to read. Moreover, images look clear and well defined. Because of this, it supports long working sessions comfortably. In addition, the screen size fits most desks well. As a result, it balances clarity and space efficiency. Smooth Visual Performance The HP P24v G5 provides smooth visuals for daily tasks. As a result, scrolling and browsing feel natural. Furthermore, the display maintains consistent brightness. This improves overall viewing comfort. Eye Comfort and Anti-Glare Screen This monitor includes eye comfort features. Therefore, it helps reduce eye strain. In addition, the anti-glare coating limits reflections. As a result, the screen stays clear in bright environments. Connectivity and Compatibility The HP P24v G5 includes HDMI and VGA ports. As a result, it connects easily to new and older devices. Moreover, setup remains quick and simple. Therefore, users can start working immediately. Design and Mounting Options The monitor features a clean and professional design. In addition, it supports VESA mounting. As a result, users can create a flexible workspace. Ideal for Office and Home Use This monitor focuses on reliability and efficiency. Moreover, it suits office work, browsing, and media viewing. In conclusion, the HP P24v G5 is a practical Full HD monitor for daily use. Specifications: Display Quality: 23.8-inch IPS panel with 1920 x 1080 resolution at 100 Hz, offering 99% sRGB color for accurate visuals. Performance: 100Hz refresh rate and 5ms GtG response time with overdrive minimize screen tearing and ghosting. Connectivity: Equipped with HDMI 1.4 and VGA ports for versatile connectivity.
BATTERY DELL WDX0R for Dell Inspiron 13 15 5000 7000 Series 5570 7579 7378 5567 7573 5565 5379 5378 Latitude 3490 3590 3340 3400 3390 3500 3190 Vostro 5468 5568 P69G 3CRH3 11.4V 42Wh About this item 【Specification】Dell laptop Replacement Battery Type: Li-ion; Voltage: 11.4V; Capacity: 42WH; Cells:3-Cell. (It is not the same as the 4-cell 33YDH 56Wh battery ) !!! Please make sure to choose the battery according to the shape of the original one, as the batteries for different laptop models may vary 【Stability】WDXOR WDX0R Laptop Battery Replacement battery for Dell offers 600+ recharge cycles over life of battery 【COMPATIBLE MODEL】(Check description below for more models) Dell Laptop Battery WDX0R P69G001 3CRH3 FC92N T2JX4 C4HCW Y3F7Y Dell Battery 3-cell 42WH 11.4v Li-on WDX0R Dell Battery Dell Inspiron 15 5570 Battery Inspiron 13-7378 battery Inspiron 15-7579 battery Dell Inspiron 5379 Battery Dell Inspiron 5567 Battery Dell Inspiron 13 7000 Battery Dell Inspiron p69g Battery Dell Inspiron 7573 Battery Dell Latitude 3340 3590 Battery Dell Vostro 5568 5468 Series Battery
The Samsung Neo QLED 8K QN900F TV delivers ultra-sharp visuals with advanced AI technology. First, it features 8K resolution for exceptional detail and clarity. In addition, the AI upscaling improves lower resolution content for a near 8K experience. Moreover, the glare-free screen reduces reflections for better viewing in bright rooms. Finally, the Neo QLED technology enhances brightness and contrast for lifelike images. The sleek design and smart features make it ideal for premium home entertainment. Specifications: 8K resolution for ultra-detailed and sharp picture quality AI upscaling improves lower resolution content to near 8K Glare-free screen reduces reflections for better visibility Neo QLED technology enhances brightness and contrast Smart TV features for streaming and easy content access
The MSI Pro MP242 24″ 75Hz Business Monitor is designed to boost productivity while offering a comfortable viewing experience. Its 24-inch screen delivers crisp visuals with Full HD resolution, making it ideal for work, study, and entertainment. With a 75Hz refresh rate, the MSI Pro MP242 ensures smooth visuals whether you’re editing documents, browsing the web, or watching videos. The anti-glare screen minimizes reflections, allowing you to work comfortably in various lighting conditions. Designed with your health in mind, the MSI Pro MP242 Business Monitor features eye-care technology. The monitor reduces blue light and flicker, helping to minimize eye strain during extended screen use. This makes it perfect for long work hours or study sessions. The MSI Pro MP242 offers versatile connectivity options with HDMI and VGA ports, allowing easy connection to multiple devices. Whether you’re connecting a laptop, desktop, or other peripherals, this monitor makes it hassle-free. With its slim and modern design, the MSI Pro MP242 24″ Monitor fits seamlessly into any professional or home office environment. Its adjustable stand allows you to tilt the screen for optimal viewing angles, providing additional comfort during use. In conclusion, the MSI Pro MP242 24″ 75Hz Business Monitor offers the perfect combination of performance, comfort, and design. Upgrade your workspace today and enjoy improved productivity with clear visuals and eye-care features. Specifications: Display : 23.8″ IPS Resolution : FHD (1920 x 1080) Refresh Rate : 75Hz Response Rate : 5ms
The Apple Magic Mouse (USB-C version) is a sleek, minimalist multi-touch wireless mouse built for Mac users. It offers smooth gesture support, Bluetooth connectivity and a built-in rechargeable battery — a great choice if you prefer a clean desk setup and full compatibility with macOS and iPadOS. General Name: Magic Mouse (USB-C) — part of Apple’s pointing-device lineup. Wireless connectivity: Bluetooth. Rechargeable battery: built-in, no disposable AA cells. Charging / port: USB-C port (bottom of mouse) for pairing and charging. Compatibility: Requires a Mac with macOS 15.1 or later, or an iPad with iPadOS 18.1 or later. Size & Weight Height: ~0.85 inch (2.16 cm) Width: ~2.25 inch (5.71 cm) Depth: ~4.47 inch (11.35 cm) Weight: ~0.22 pound (0.099 kg) (varies slightly by manufacturing) Features Multi-Touch surface: supports gestures such as swiping between pages, scrolling through documents, zooming. Glide / foot design: optimized for smooth movement across desktop surfaces. Rechargeable battery life: about a month or more between charges (typical use) per Apple spec. Used Condition ConsiderationsSince you’re specifying a used unit: Check for wear on the bottom feet / skates — these degrade and affect glide. Verify battery capacity / health (rechargeable batteries age). Confirm the port is functioning (USB-C) and Bluetooth connectivity is stable. Look for signs of excessive surface scratches on the multi-touch top — may impair gestures. Ensure the firmware / Mac recognizes it fully (gestures working). Upgradability / Limitations Not user-upgradable: You cannot replace the internal battery or change internals easily. Design limitation: The USB-C port remains on the bottom of the mouse, meaning you cannot use it while charging unless you flip it. This design is still criticized. Ergonomics: The flat, low-profile design is stylish but may not suit extended-use comfort for some users.
AOC U32G3X 32-inch 4K 144Hz gaming monitor delivers ultra-sharp visuals and high-speed performance for gaming and productivity. It combines UHD resolution with fast refresh rate and low response time for smooth and detailed gameplay. Additionally, it features a 31.5-inch IPS panel with 4K UHD resolution (3840 × 2160). This resolution provides very high image clarity, so it improves detail in games, design, and media work. Moreover, the monitor supports a 144Hz refresh rate with 1ms response time. As a result, it delivers smooth motion and reduces blur in fast-paced gaming scenarios. The display uses Fast IPS technology. Therefore, it ensures accurate colors and wide viewing angles while maintaining fast pixel response. In addition, it includes Adaptive Sync support. This reduces screen tearing and stuttering, so gameplay remains stable and fluid across variable frame rates. Furthermore, it supports HDR and high brightness performance. This improves contrast and enhances visual depth in supported content. The monitor also includes HDMI 2.1 and DisplayPort connectivity. So it supports modern GPUs and high-resolution, high-refresh gaming setups. AOC U32G3X 32-inch 4K 144Hz gaming monitor provides a strong balance of ultra-high resolution and competitive gaming performance for advanced users. Check out other option here! Specifications: 31.5-inch Fast IPS panel with 4K UHD 3840 × 2160 resolution 144Hz refresh rate for smooth gaming performance 1ms response time for reduced motion blur Adaptive Sync for tear-free gameplay HDMI 2.1 and DisplayPort support for modern setups
The MSI Pro MP253 24.5″ 100Hz Business Monitor is designed for professionals seeking smooth performance and high efficiency. It delivers a crisp Full HD display for sharp visuals and clear text. With a 100Hz refresh rate, this business monitor provides fluid motion and reduces screen tearing. Scrolling through documents and web pages feels smoother, improving your workflow. The fast response time ensures minimal motion blur for a better viewing experience. The MSI Pro MP253 24.5″ 100Hz Business Monitor features a sleek and modern design. Its ultra-slim bezels maximize screen space, making it ideal for multi-monitor setups. The stand is sturdy and adjustable, ensuring comfortable viewing angles. This business monitor comes with anti-flicker and low blue light technology. It reduces eye strain, making it perfect for long working hours. The comfortable viewing experience enhances focus and productivity. Connectivity options include HDMI and DisplayPort, allowing easy connection to various devices. Whether using a laptop, desktop, or docking station, this MSI business monitor ensures seamless compatibility. The MSI Pro MP253 24.5″ 100Hz Business Monitor offers vibrant colors and excellent contrast. The IPS panel provides wide viewing angles, ensuring clear visuals from any position. With energy-efficient performance, this business monitor consumes less power without compromising quality. It is an eco-friendly choice for offices and home workspaces. For professionals needing a reliable display, the MSI Pro MP253 24.5″ 100Hz Business Monitor is a great choice. It offers smooth visuals, eye-care features, and a stylish design to enhance productivity. Specifications: Display : 24.5″ IPS Resolution : 1920×1080 FHD Refresh Rate : 100Hz Response Rate : 1ms Speaker : 3W x2
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.
The ViewSonic VX2479-HD-PRO is a 24-inch monitor designed to deliver stunning visuals and smooth performance for gaming, work, or entertainment. Whether you’re streaming videos, editing documents, or playing your favorite games, this monitor ensures vibrant colors and sharp details. Featuring a Full HD resolution of 1920×1080 pixels, the ViewSonic VX2479 provides crystal-clear image quality. You can enjoy a high-definition viewing experience that brings your movies, games, and content to life. This monitor comes equipped with an IPS panel, which offers wide viewing angles and consistent color reproduction. Whether you’re looking at the screen from the side or straight on, the picture quality remains bright and accurate. The ViewSonic VX2479-HD-PRO also supports a 75Hz refresh rate, ensuring smooth and fluid visuals. This makes it ideal for fast-paced gaming and action-packed scenes, reducing motion blur and providing a more enjoyable experience. With multiple connectivity options, including HDMI and DisplayPort, the ViewSonic VX2479 offers easy connections to your PC, gaming console, or other devices. Switching between work and play is quick and hassle-free. Designed with a sleek, frameless design, this monitor adds a modern touch to any workspace or gaming setup. It is lightweight and easy to set up, making it perfect for both home and office use. In conclusion, the ViewSonic VX2479-HD-PRO offers a stunning blend of sharp visuals, vibrant colors, and smooth performance. Upgrade your setup with this versatile monitor and experience high-quality viewing for work and play. Specifications: Resolution : FHD Display : 24″ IPS Refresh Rate : 180Hz Response Time : 1ms
The ViewSonic VA2732-mhd 27″ FHD 100Hz Monitor delivers smooth visuals for work, study, and daily entertainment. Its Full HD resolution shows clear text and sharp image details. The 27-inch screen gives more space for multitasking and viewing comfort. This helps users stay focused and productive. Moreover, the ViewSonic VA2732-mhd 27″ FHD 100Hz Monitor features a fast 100 Hz refresh rate. This makes scrolling smoother and motion more natural. Videos and animations look cleaner with less blur. As a result, the viewing experience feels more comfortable. In addition, the monitor uses IPS panel technology for wide viewing angles. Colors stay accurate even when viewed from the side. This helps during group work and shared screen use. The image remains bright and stable from all directions. Furthermore, the ViewSonic VA2732-mhd 27″ FHD 100Hz Monitor includes eye comfort features for daily protection. The low blue light mode reduces eye strain during long use. The flicker-free design supports viewing without discomfort. These features help users work longer with better comfort. Also, the monitor offers built-in speakers for simple audio needs. This removes the need for extra speakers in small spaces. Sound is clear for meetings, videos, and casual media. Desk setups stay clean and organized. In addition, the ViewSonic VA2732-mhd 27″ FHD 100Hz Monitor supports flexible connections. It includes HDMI, DisplayPort, and VGA for wide compatibility. You can connect laptops, desktops, and media devices easily. Switching between sources becomes quick and smooth. Moreover, the slim bezel design gives a modern and clean look. It fits well in home and office spaces. The stand supports tilt adjustment for better viewing comfort. Wall mounting is also supported for flexible setups. Overall, the ViewSonic VA2732-mhd 27″ FHD 100Hz Monitor delivers clarity, smooth motion, and daily comfort. It supports work, entertainment, and multitasking with ease. This monitor is an excellent choice for users who want large size and smooth performance. Specifications: Display : 27″ IPS Resolution : FHD 1920 x 1080 Refresh Rate : 100Hz Response Time : 1ms
The ViewSonic VA2723-2K-HD 27″ QHD 100Hz Monitor gives sharp, high-resolution visuals for work, games, and media. Its QHD display shows clear, detailed images for photos, videos, and documents. The 27-inch size offers wide viewing space for multitasking and productivity. Moreover, the ViewSonic VA2723-2K-HD 27″ QHD 100Hz Monitor features a smooth 100 Hz refresh rate. This makes motion look fluid and clean on screen. Scrolling, movies, and games feel smoother and more pleasant. This reduces blur during fast scenes. In addition, the monitor uses a bright and vibrant panel for strong color accuracy. Colors stay true from various viewing angles. This helps media, design work, and daily tasks look natural and appealing. It’s great for creators, students, and professionals. Furthermore, the ViewSonic VA2723-2K-HD 27″ QHD 100Hz Monitor includes eye-care technology for comfortable long use. It offers Flicker-Free display to reduce screen flicker. The blue light filter helps lower eye strain. This gives you safer viewing during work or study sessions. Also, the monitor supports HDMI and DisplayPort connections for easy setup. You can connect laptops, desktops, and consoles without hassle. The simple plug-and-play design means less time configuring. This suits home, office, and gaming setups. The design of the ViewSonic VA2723-2K-HD 27″ QHD 100Hz Monitor is modern and minimal. The slim frame fits well on desks of different sizes. The clean look blends into professional and home environments alike. The solid build gives you durable and long-lasting performance. Overall, the ViewSonic VA2723-2K-HD 27″ QHD 100Hz Monitor delivers a great balance of clarity, smoothness, and eye comfort. It boosts productivity, improves media quality, and supports long use. This monitor is ideal for anyone seeking quality and comfort in one screen. Specifications: Display : 27″ IPS Resolution : 2560×1440 Refresh Rate : 100Hz Response Time : 1ms
The Samsung 27″ 120Hz Essential S3 Monitor LS27F320GAMXUE delivers clear and smooth visuals with a Full HD (1920 × 1080) resolution and 120 Hz refresh rate, which helps reduce motion blur and lag during fast‑moving scenes. Additionally, the IPS panel provides wide viewing angles and consistent color across the screen, making it suitable for work, entertainment, and casual gaming. The monitor includes Game Picture Mode to optimize contrast and color settings for different game genres. Moreover, Samsung equips this monitor with Eye Saver Mode and Flicker Free technology to help reduce eye strain during extended use. Therefore, users can stay comfortable during long work or play sessions. The design features a modern, slim bezel look that enhances any desk setup. Connectivity includes two HDMI 1.4 ports for flexible device connection. Specifications: Display : 27″ Resolution : 1920 x 1080 FHD Refresh Rate : 120Hz Response Rate : 5ms
The AOPEN 32HC5QR 31.5″ FHD 165Hz Curved Gaming Monitor wraps your view with a wide curved screen. It gives immersive visuals for gaming, work, or movies. The Full HD resolution produces clear, sharp images. The 31.5‑inch size provides plenty of screen space for multitasking or play. Moreover, the AOPEN 32HC5QR offers a high 165 Hz refresh rate that delivers very smooth motion. Fast action scenes appear fluid and crisp. The VA panel gives deep contrast and rich blacks for vibrant visuals. This enhancement adds depth to games and movies. In addition, the monitor uses adaptive sync (AMD FreeSync Premium) to match frame rate and screen refresh. This avoids screen tearing and stutter during gameplay. You get stable and consistent frame delivery even in intense gaming. Also, the curved 1500R / 1800R screen design helps immerse you deeper into action. It reduces eye‑strain by keeping all parts of the display at a comfortable viewing distance. The AOPEN 32HC5QR includes useful eye‑care features. It has Flicker‑Free and BlueLightShield technologies to reduce screen flicker and filter blue light. This helps protect your eyes during extended use. It also supports HDMI and DisplayPort connectivity for easy setup with laptops, PCs, or consoles. The monitor includes a slim bezel design for a clean modern look. It has a tilt‑adjustable stand and works with VESA mounts for flexible placement. The build feels solid and reliable for everyday use. Overall, the AOPEN 32HC5QR 31.5″ FHD 165Hz Curved Gaming Monitor combines immersive curved display, smooth refresh rate, strong contrast, and eye‑friendly design. It improves gaming, work, and entertainment experiences. It is ideal for gamers, content viewers, and everyday users who want a large, smooth, and comfortable display. Specifications: Display : 31.5 VA Resolution : FHD 1920×1080 Refresh Rate : 165Hz Response Time : 1ms Curvature : 1800R
HP LaserJet M111w Black & White Multifunction Printer, Wireless & Mobile Printing, 600 x 600 dpi Resolution, Print speed up to 20 ppm, 8000-page Monthly Duty Cycle, USB / Wireless Connectivity | 7MD68A White
The Asus TUF VG249Q1R 24″ 144Hz Gaming Monitor delivers smooth and immersive gameplay. With a 144Hz refresh rate and 1ms response time, it ensures ultra-fast performance for competitive gaming. This 24-inch Full HD display offers crisp and vibrant visuals. The IPS panel provides wide viewing angles and accurate colors, making every detail stand out. Whether you’re gaming or watching movies, the experience is stunning. With Extreme Low Motion Blur (ELMB) technology, motion blur is reduced for sharper images. This keeps fast-moving scenes clear and prevents ghosting. Your gameplay stays smooth and responsive. The Asus TUF VG249Q1R also features Adaptive-Sync and FreeSync technology. These prevent screen tearing and stuttering, ensuring fluid visuals. Even in intense action, your gameplay remains lag-free. Designed for comfort, this gaming monitor has flicker-free technology and a low blue light mode. These features reduce eye strain, making long gaming sessions more comfortable. The monitor has multiple connectivity options, including HDMI and DisplayPort. It’s compatible with PCs, gaming consoles, and other devices, making it a versatile choice. With a sleek, TUF Gaming-inspired design, the monitor looks as good as it performs. The slim bezels provide a modern look, perfect for multi-monitor setups. Upgrade your gaming setup with the Asus TUF VG249Q1R 24″ 144Hz Gaming Monitor for smooth, immersive, and tear-free gaming. Specifications: Display : 24″ IPS Resolution : 1920×1080 FHD Refresh Rate : 144Hz Response Rate : 1ms
