The Samsung 75″ Neo QLED QN70F 4K Vision AI Smart TV QA75QN70FAUXTW delivers a premium viewing experience with advanced Neo QLED technology. It produces bright, sharp, and highly detailed images with strong contrast, so movies, sports, and games look more immersive on the 75-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. Therefore, the TV consistently delivers optimized visuals without manual settings. In addition, AI upscaling improves lower-resolution content closer to 4K quality for better clarity and detail. 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 when switching between apps. In addition, the slim design with thin bezels gives the Samsung 75 Neo QLED QN70F 4K Vision AI Smart TV QA75QN70FAUXTW 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 75-inch 4K display provides immersive viewing experience Vision AI optimizes picture and sound automatically HDR improves contrast, brightness, and color depth Smart TV platform supports apps, streaming, and smart features
Professional battery testing flex cable for MacBook Pro 15″ (Model A1990, 2018–2019)—used by technicians to bypass a faulty battery or diagnose power-on issues without permanent battery removal. Enables safe logic board testing and troubleshooting. This is not a replacement battery cable—it’s a diagnostic tool used in repair workflows. It mimics the battery’s presence by providing the necessary SMBus signal and power-enable lines to the logic board, allowing the MacBook to: Power on without a battery installed Test logic board functionality independently Diagnose whether a no-power issue is caused by the battery or logic board MacBook Pro 15″ (2018–2019) Model: A1990 Model Identifiers: MacBookPro15,2 Chip: Intel Core i7/i9 Model: A1990 Model Identifiers: MacBookPro15,2 Chip: Intel Core i7/i9 ⚠️ Not compatible with A1707 (2016–2017), A2159 (16″), or any M1/M2 models. Simulates battery presence via correct SMBus resistance and ID signals Includes power-enable circuitry matching Apple’s safety protocol Pre-terminated with OEM-style connector for A1990 logic board Allows safe bench testing of logic boards during repair Diagnosing “no power, no fan spin, no display” issues Verifying if a logic board powers on without risking a shorted battery Testing after liquid damage or DC-in board replacement Avoiding unnecessary battery replacements during diagnostics Not for permanent installation—intended for temporary diagnostic use only Does not charge or store power—requires connected USB-C power adapter to operate Must be used with a known-good power adapter (87W recommended) Not a consumer part—designed for professional repair shops and technicians
A robust Beurotika cash drawer featuring a 450mm metal body, secure 3-position lock, and compatibility with most POS systems—ideal for retail, restaurants, and small businesses. Secure 3-position key lock: Open, locked, and release-to-print modes for controlled access 6 coin slots + 4 bill compartments: Organized layout for efficient cash handling Heavy-duty steel construction: Reinforced frame and smooth slide rails for daily reliability Standard RJ12 interface: Compatible with most POS systems (e.g., Epson, HP, Bixolon, and Beurotika receipt printers) Auto-open trigger: Automatically opens when connected to a compatible receipt printer during transactions Bottom cable entry: Keeps wiring neat and protected
Philips 271V8W is a 27-inch Full HD LCD monitor designed for everyday use. It delivers a 1920 × 1080 resolution with a 75Hz refresh rate and IPS panel for wide viewing angles and consistent color performance. Additionally, it includes Adaptive Sync technology for smoother visuals and reduced screen tearing. Moreover, it supports Flicker-Free technology and LowBlue Mode to help reduce eye strain during long use. It also features an anti-glare coating for more comfortable viewing in bright environments. SmartContrast adjusts brightness and contrast based on displayed content for improved image clarity. The Philips 271V8W monitor provides a simple and reliable 27-inch IPS display experience with smooth 75Hz performance for daily tasks. Specifications: 27-inch IPS panel with Full HD 1920 × 1080 resolution 75Hz refresh rate for smooth daily visuals Adaptive Sync for reduced screen tearing Flicker-Free technology for eye comfort LowBlue Mode and anti-glare coating for reduced eye strain
Elevate Your Gaming with the ViewSonic VX2728 27” 180Hz Gaming Monitor – Simple, Smooth, and Immersive! Are you searching for a monitor that can elevate your gaming experience? Look no further than the ViewSonic VX2728 27” opens 165 to 180Hz Fast IPS Gaming Monitor, designed to provide a simple, smooth, and immersive gaming experience. First and foremost, let’s talk about simplicity. Setting up this gaming monitor is a breeze. With straightforward instructions, you’ll have your high-quality gaming display ready to go in no time. No need for complicated technical knowledge. therefore One of the standout features of the ViewSonic VX2728 is its impressive 180Hz refresh rate. This means that you can enjoy incredibly smooth and responsive gameplay, free from annoying screen tearing and lag. It’s gaming made easy. The Fast IPS panel on this monitor ensures vibrant colors and wide viewing angles, making your games come to life. You don’t need to be a tech expert to appreciate the stunning visuals that this monitor offers. This gaming monitor has been designed with user-friendliness in mind. It comes with a simple interface that allows you to customize settings such as brightness and contrast easily. No need to navigate complex menus. Additionally, the monitor boasts ultra-slim bezels that minimize distractions, providing an immersive gaming experience. With your focus squarely on the game, you’ll find yourself performing at your best. In conclusion, the ViewSonic VX2728 27” 180Hz Fast IPS Gaming Monitor offers simplicity, smooth gameplay, and an immersive experience. With easy setup, stunning visuals, and user-friendly features, it’s the ideal choice for gamers of all levels. Elevate your gaming experience with the ViewSonic VX2728 today. you can always check here and if you like to see other options you can check here ! Specifications: Fast IPS Display with HDR10 AMD FreeSync™ Premium for smooth gameplay VESA AdaptiveSync for tear-free gaming experience 1 year warranty
MacBook Pro 15″ Top case A1990 2018 2019 MacBook Pro 15″ A1990 MacBookPro15,1 Mid 2018: MR932LL/A or MR962LL/A (2.2 GHz Core i7) MacBookPro15,1 Mid 2018: MR942LL/A or MR972LL/A (2.6 GHz Core i7) MacBookPro15,3 Mid 2018: BTO/CTO (2.6 GHz Core i7) MacBookPro15,3 Mid 2018: BTO/CTO (2.9 GHz Core i9)
POUT E3 Angle - Adjustable Angled Ergonomic Laptop Stand Riser - Notebook Computer Holder Compatible w/MacBook Air Pro Dell HP & More 11"-17" Laptops - Foldable & Portable w/ 5 Angles (Silver) POUT E3 Angle – Adjustable Angled Ergonomic Laptop Stand Riser – Notebook Computer Holder Compatible w/MacBook Air Pro Dell HP & More 11″-17″ Laptops – Foldable & Portable w/ 5 Angles (Silver)
The HP Omen 24″ FHD 165Hz Gaming Monitor delivers clear, sharp visuals for gaming and everyday use. Its Full HD resolution shows crisp details in games, videos, and work. The 24-inch screen size offers a compact yet immersive view. This makes it easy to focus during intense gaming or tight spaces. Moreover, the HP Omen 24″ FHD 165Hz Gaming Monitor features a 165 Hz refresh rate. This higher refresh rate makes motion smoother and more fluid. Fast-paced games and action scenes look clean and sharp. This reduces blur and improves your reaction time. In addition, the monitor offers low response time for minimal input lag. This helps controls feel responsive and precise. It improves performance in competitive games and fast shooters. This makes every frame count when speed matters. Furthermore, the HP Omen 24″ FHD 165Hz Gaming Monitor uses a panel that provides good colors and contrast. Colors look vibrant and natural for gaming, movies, and everyday tasks. Also, the monitor comes with easy connectivity via HDMI and DisplayPort. You can connect consoles, PCs, or laptops easily. Setup is quick and simple without extra hassle. This makes it a versatile pick for different setups. The design of the HP Omen 24″ FHD 165Hz Gaming Monitor is clean and modern. The slim bezels give it a sleek look. The stand is sturdy and stable, fitting well on small desks. The form factor suits minimal and gaming-focused spaces. Overall, the HP Omen 24″ FHD 165Hz Gaming Monitor blends speed, clarity, and compactness in one strong gaming display. It enhances gameplay, offers sharp visuals, and stays responsive. This monitor is ideal for gamers who want performance and simplicity without a large footprint. Specifications: Display : 24″ IPS Resolution : 1920×1080 Refresh Rate : 165Hz Response Time : 1ms
BATTERY DELL J60J5 7.6V 55Wh Battery Compatible with Dell Latitude E7470 E7270 7470 7270 451-BBSY 451-BBSX 451-BBSU WYWJ2 R1V85 MC34Y 242WD PDNM2 1W2Y2 GG4FM F1KTM NJJ2H 5F08V P61G001 P26S001 J6OJ5 Laptop Battery About this item SPECIFICATION : Model Name: Standard Rechargeable Li-ion battery Type J60J5 ; Device Type: Notebook battery; Battery Type: Lithium ion; Voltage : 7.6V; Capacity : 55Wh; Cells: 4-cell; Dimensions about 9.37×4.17×0.24in; Weight: About 11OZ / 0.69lb; Condition : 100 % New; Packages includes: 1PC J6OJ5 laptop battery(with free screwdrivers for easy installation) COMPATIBILITY : 7.6V 55 WHr 4-Cell Lithium-Ion battery replace manufacturer part J60J5 J6OJ5 451-BBSX 451-BBSY 451-BBSU R1V85 WYWJ2 MC34Y 0MC34Y 242WD PDNM2 1W2Y2 0F1KTM F1KTM NJJ2H GG4FM 5F08V P61G P61G001 P26S P26S001 battery designed for Dell Latitude E7270 Latitude E7470 7270 7470 Series laptop. SECURITY: ECHEER 55Wh 4-cell J60J5 batteries have passed strict intelligent detection, such as short circuit protection, over-voltage protection, discharge protection, and over-current protection, which is very important for the battery’s use cycle and safety. Also, CE, FCC, and RoHS are certificated. Every one of our replacement notebook batteries is tested to meet OEM specifications.
NB OMS040 OMS040 NB STAND DESK TV INNOVATIVE SIT STAND DESK MOUNT: UNIVERSAL COMPATIBILITY: Fits Most 22” – 32” Monitor with the load from4.4 lbs up to 33lbs, VESA compliant 75x75mm 100x100mm. Come with ultra-widekeyboard tray, 25.6″L x13.4”W. Keyboard Tray pull out range 2”(50mm). FULL MOTION MOUNT: A Wide range of movements, The monitor can berotated and tilted effortlessly in any direction, Tilt Angel from +9°to -12°with acombined +3°to -3° degree landscape rotation, Upright range is 17.1’’(435mm) withswivel angel ±90 degrees. The mounts extension and retraction 50.4’’ (1280 mm) and3.9’’ (100 mm) display height adjustment. EASY INSTALLATION: Built in durable gas-strut to hover at any workingpositions, Simple installation and easy to use, effortless operation; Switches fromsitting to standing position in just a few seconds. HAT6 STAND 6 LCD/LED DESK MOUNT 12”-24”-JTD003II6 -MAX-LOAD:10KG -TILT:+/-10 degree- SWIVEL:180 degree H148 Specifications: Specifications COMPATIBILITY: Fits Most 22” – 32” Monitor with the load from4.4 lbs up to 33lbs, VESA compliant 75x75mm 100x100mm. Come with ultra-widekeyboard tray, 25.6″L x13.4”W. Keyboard Tray pull out range 2”(50mm). FULL MOTION MOUNT: A Wide range of movements, The monitor can be rotated and tilted effortlessly in any direction
The ViewSonic VX2779A-HD-PRO 27″ FHD 240Hz Gaming Monitor delivers ultra-smooth visuals for fast games. It features a 27-inch IPS panel that offers wide viewing angles and rich color. Moreover, the high 240 Hz refresh rate helps motion look fluid and responsive in action titles. This gaming monitor supports Full HD 1920×1080 resolution for crisp images and clear details. Additionally, the 1 ms response time (MPRT) reduces blur and ghosting in fast scenes. Adaptive sync tech like AMD FreeSync and NVIDIA G-SYNC compatibility helps cut screen tearing and stutter. The ViewSonic VX2779A-HD-PRO also includes HDR10 support to boost contrast and color depth for games and videos. Furthermore, anti-glare coating and low blue light help reduce eye strain during long play sessions. Multiple ports make setup easy with two HDMI and one DisplayPort connection. This monitor works well for competitive gaming, esports, and general entertainment. Therefore, it suits both PC gamers and console players. Finally, it combines speed, quality visuals, and versatile connectivity for everyday gaming use. Specifications: 27″ IPS panel with 1920×1080 Full HD resolution 240 Hz refresh rate and 1 ms (MPRT) response time HDR10 support and wide 178° viewing angles Connectivity: 2× HDMI 1.4 + 1× DisplayPort 1.4 Eye-care features: anti-glare, low blue light, and flicker-free
The MSI Optix AG321CQR Gaming Monitor delivers immersive visuals with a 31.5″ curved display and QHD resolution. It enhances gaming with a 1500R curve for better field of view. Moreover, it features a 165Hz refresh rate and 1ms response time for smooth motion. This improves clarity in fast-paced gameplay. The VA panel provides high contrast and rich colors. It supports wide viewing angles for consistent image quality. Adaptive Sync with FreeSync Premium reduces screen tearing and stutter. This ensures fluid and stable performance during gaming sessions. It also includes anti-flicker and low blue light features for eye comfort. The adjustable stand allows tilt, swivel, height, and pivot adjustments. The MSI Optix AG321CQR Gaming Monitor is ideal for users who want immersive curved visuals and smooth performance. Specifications: 31.5″ QHD (2560×1440) VA curved panel with 1500R curvature 165Hz refresh rate for smooth gaming performance 1ms (MPRT) response time for reduced motion blur AMD FreeSync Premium for tear-free gameplay Adjustable stand with tilt, swivel, pivot, and height options
VI04 V104 Replacement Laptop Battery for HP Envy 14 15 17 Series HP Pavilion 15 17 Notebook Series TPN Q139 Q140 Q141 Q142 Q143 Spare 756743-001 About this item Battery Type: Li-ion; Voltage: 14.8V; Capacity: 2200MAH; Cells:4-cell Replacement Battery for HP Envy 14 15 17 Laptop Series 14-v000-v099 15-k000-k099 17-f000 -f099 m7-k211dx m7-k111dx m7-k211dx 15t-k100 15t-k200 17t-k000; HP Pavilion 15 17 Laptop Series 15-p000 to p099, 15-x000 to x099, 17-f000 to f099, 17-x000 to x099; 14-V006LA 15-P030NR 15-P390NR 15-P099NR 15-P100DX 15-P133CL 15-P114DX 17-F053US 17-F113DX Compatible Models for HP ProBook 440 G2 445 G2 450 G2 455 G2 756743-001 756744-001 756745-001 756479-421 756478-421 756478-422 756478-851 HSTNN-DB6K HSTNN-DB6J HSTNN-LB6K HSTNN-LB6I All products are Certified by CE FCC for safety; Strict guidelines for compatibility, and standards compliance for environmental safety
BATTERY LENOVO 00HW023 11.25V 2.09Ah 24Wh 00HW022 00HW036 SB10F46460 Notebook Battery Compatible with Lenovo Thinkpad T460s Series Laptop About this item Condition: New Voltage: 11.25V Capacity: 24Wh/2090mAh Color: Black Replace Part Number: 00HW022 ASB10F46460 00HW023 SB10F46461 00HW036 SB10F46474 Fit for Laptop Models: Lenovo Thinkpad T460s T470s Series Laptop Notebook The Package Includes: a 1X 00HW022 battery. Before purchasing, please open the back cover of the laptop to confirm the battery model and capacity. Raise the battery life: 1:After receiving the battery, Please charge it fully, then discharge it to around 10%, and do itthreee times. 2:If you don’t use the battery for a long time, please charge and discharge it once a month
Authentic UK layout keyboard replacement for MacBook Air 13″ (Model A2338, 2020)—featuring Apple’s Magic Keyboard with scissor-switch mechanism, backlighting, and precise OEM fit for reliable performance and typing comfort. Compatible With: MacBook Air 13-inch (2020, Model A2338) – includes both Intel (Core i3/i5/i7) and Apple M1 chip variants. Layout: UK English (QWERTY) with £ symbol, tall vertical Enter key, and standard UK key labeling—exactly matches Apple’s original UK regional keyboard. Keyboard Type: Apple’s Magic Keyboard with scissor-switch mechanism—delivering quiet, responsive keystrokes, 1mm key travel, and greater long-term reliability than Butterfly keyboards. Integrated Features: Backlit keys for dim environments, ambient light sensor compatibility, and factory-matched ribbon cable for seamless connection to the logic board. Precision Build: Engineered to OEM specifications for exact alignment, key spacing, and tactile feedback—ensures a flush, secure fit within the original top case. Installation Note: The keyboard is glued into the top case and requires complete disassembly for replacement. Professional tools and adhesive are needed for proper reinstallation. Recommended for skilled technicians only.
A1989 Battery Replacement, A1964 Battery for MacBook Pro 13″ A1989 (Mid 2018 2019) A2251(2020 Release) EMC 3214 3358 3348 MR9Q2LL/A MR9R2LL/A MR9T2LL/A MR9U2LL/A MR9V2LL/A MV962LL/A MV9A2LL/A 【Specification】Voltage: 11.41V. Capacity: 58Wh/ 5086mAh. Battery Type: Li-ion. Condition: Brand new, from high quality materials, top circuit boards and smart chip. 【Compatible Part Number】A1964 A1989 A1989(EMC 3214) A1989(EMC 3358) A2251(EMC 3348) 020-02497 616-00419. 【Compatible Laptop Models】MacBook Pro 13-Inch model A1989 (Mid 2018, Mid 2019) , A2251(2020 Release), Order No MR9Q2LL/A MR9R2LL/A MR9T2LL/A MR9U2LL/A MR9V2LL/A MV962LL/A MV972LL/A MV982LL/A MV992LL/A MV9A2LL/A MWP72LL/A MWP82LL/A MWP42LL/A MWP52LL/A MWP62LL/A MR9Q2 MR9R2 MR9T2 MR9U2 MR9V2 MV962 MV972 MV982 MV992 MV9A2 MWP62. 【Note】The tools are included. Double-sided tape is attached to the back of the battery, but NO battery installation instruction. The MBP battery is difficult to disassemble, we suggest you search for related installation videos or find a technician for help.
SanDisk 2TB Portable SSD - Up to 800MB/s, USB-C, USB 3.2 Gen 2, Updated Firmware - External Solid State Drive - SDSSDE30-2T00-G26 SanDisk 2TB Portable SSD – Up to 800MB/s, USB-C, USB 3.2 Gen 2, Updated Firmware – External Solid State Drive – SDSSDE30-2T00-G26 About this item Solid state performance with up to 800MB/s read speeds in a portable drive. (Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes.) Back up your content and memories on a storage solution that fits seamlessly into your mobile lifestyle. Take it with you on your adventures—up to two-meter drop protection means this durable drive can take a beating. (Based on internal testing.) Secure it to your belt loop or backpack for extra peace of mind thanks to the tough rubber hook. From SanDisk, a brand professional photographers trust to take on assignments.
The MSI G27CQ4 E2 27″ 170Hz gaming monitor offers stunning visuals and smooth gameplay, ensuring you have the best gaming experience possible. Firstly, the MSI G27CQ4 E2 boasts a 27-inch curved display. This size and curvature provide an immersive viewing experience, allowing you to fully engage in your favorite games. The 2560×1440 resolution ensures crisp and clear visuals, making every detail come to life. Additionally, this monitor features a 170Hz refresh rate. With such a high refresh rate, you can enjoy fluid motion without any lag. This is crucial for fast-paced games where every millisecond counts. Paired with a 1ms response time, the MSI G27CQ4 E2 ensures quick and accurate responses to your inputs. Moreover, the monitor supports AMD FreeSync technology. This helps eliminate screen tearing and stuttering, providing a seamless gaming experience. You can game for hours without worrying about visual disruptions. The MSI G27CQ4 E2 also comes with multiple connectivity options. It includes HDMI and DisplayPort inputs, allowing you to connect to various devices. This versatility ensures that you can easily set up your gaming station. In terms of design, the MSI G27CQ4 is sleek and modern. Its slim bezels and stylish stand add a touch of elegance to your gaming setup. The adjustable stand also allows you to find the perfect viewing angle for maximum comfort. In conclusion, the MSI G27CQ4 E2 27″ 170Hz gaming monitor is the ideal choice for gamers seeking top-tier performance. Its combination of stunning visuals, smooth gameplay, and versatile features make it a must-have. Upgrade your gaming experience with the MSI G27CQ4 today! Specifications: Display : 27″ VA Resolution : 2560 x 1440 (WQHD) Refresh Rate : 170Hz Response Rate : 1ms Curvature : 1500R
LG 49WL95C-WE UltraWide Dual QHD IPS Monitor is a 49-inch super ultrawide display designed for heavy multitasking and professional workflows. It features a 32:9 aspect ratio with Dual QHD resolution for a wide workspace. Additionally, it supports USB-C connectivity and HDR10. Therefore, it replaces a dual-monitor setup with a single continuous screen. The LG 49WL95C-WE UltraWide Dual QHD IPS Monitor delivers 5120 × 1440 resolution with IPS panel technology for wide viewing angles. Moreover, it includes 99% sRGB color coverage and HDR10 support for accurate visuals. It also provides USB-C with up to 85W power delivery, HDMI, and DisplayPort inputs. In addition, it features built-in 10W stereo speakers and an integrated USB hub for cleaner setups. Furthermore, the monitor supports Picture-by-Picture and Dual Controller functions for multi-device use. As a result, users can manage two systems on one screen efficiently. It also includes height, tilt, and swivel adjustment for ergonomic comfort. Specifications: 49-inch 32:9 UltraWide Dual QHD (5120 × 1440) IPS display USB Type-C with up to 85W power delivery HDR10 with 99% sRGB color coverage Built-in 10W stereo speakers and USB hub Picture-by-Picture and Dual Controller multitasking support
The MSI MAG 244F 24″ 200 Hz Gaming Monitor delivers smooth visuals with super‑fast refresh rate. It features a full HD (1920×1080) IPS panel for vivid colors and wide viewing angles. Moreover, its 1 ms MPRT response time reduces motion blur during fast-paced gameplay. Also, the 200 Hz refresh rate ensures fluid motion in competitive games. In addition, the monitor supports Adaptive‑Sync to eliminate screen tearing and stutter. Besides that, the slim bezel design creates an immersive multi‑monitor setup. Furthermore, the adjustable stand allows tilt, height, and swivel customization. Therefore, users can find a comfortable viewing position effortlessly. It includes DisplayPort and HDMI inputs for flexible connectivity. Also, built‑in gaming presets offer easy optimization for different game genres. Plus, MSI’s Anti‑Flicker and Less Blue Light technologies reduce eye strain. Meanwhile, the monitor uses a VESA mount for wall or arm installation. Importantly, the sturdy stand delivers stable support during intense gaming sessions. Also, on‑screen crosshair overlays enhance accuracy in FPS games. Unlike standard monitors, this one targets e‑sports and fast‑reaction players. However, it still works well for streaming, editing, and productivity tasks. For example, racing, shooter, or fighting games feel more responsive and clear. Then, users connect cables, power on, and enjoy lag‑free visuals instantly. Moreover, the ergonomics support comfort during long gaming or desk sessions. As a result, performance gains combine with healthy posture support. Also, the display’s vivid contrast keeps dark and bright details visible. In addition, its low input lag provides competitive advantage in fast games. Therefore, gamers stay ahead with accurate and real‑time feedback. Also, the monitor’s sleek black design complements any gaming setup. Furthermore, MSI’s reliable build quality offers long‑term durability. Consequently, users gain both style and substance in one package. Also, all essential cables come in the box for easy setup. In conclusion, the MSI MAG 244F offers 200 Hz speed, IPS clarity, and gaming comfort. Finally, it’s a smart investment for serious gamers seeking fluid performance. Specifications: Display : 23.8” Rapid IPS Resolution : 1920 x 1080 (FHD) Refresh Rate : 200Hz Response Rate : 0.5ms
