Specification: Origin: Mainland China Type: 2.4Ghz Wireless Application: Number Keyboard Standard: Keyboard Language: Russian,FRENCH,KOREAN,HEBREW,English Operation Style: Capacitive Interface Type: USB Style: Standard Package: Yes Number of keys: 35 keys Battery capacity: 400mA Bluetooth-Compatible version: Bluetooth-Compatible 3.0 or 5.2 dual channel Battery life: 80 hours Working frequency: 2.402-2.480GHz Standby time: 600 hours Power supply: built-in lithium polymer battery USB: Type C charging plug System compatibility: for Mac OS 10.0 and above, | operating system 9.2 and above, compatible for Mac, for Macbook, for Macbook Air/Pro. for Windows 2000/XP/Vista/7/8/10, for Android system Color: gray black, silver white Product size: 145.00x132.00x128.00mm Product size: 5.71x5.2x5.04inch Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 X Number Pad 1 X Charging Cable 1 X Receiver Aluminum Alloy Casing and Long Battery Life: Encased in a robust sandblasted aluminum alloy, our numeric keyboard is built for longevity and style. Equipped with a 300mAh rechargeable polymer lithium battery, it delivers up to 20 hours of continuous use and 30 days on standby, ensuring your productivity is never hampered. Rechargeable and Ergonomic Design: Bid farewell to the inconvenience of constant battery changes with our rechargeable digital keyboard. Its ergonomically designed keys utilize a scissor-foot structure, minimizing typing mistakes and ensuring a swift, comfortable typing session. Automatic Reconnection: Experience the convenience of automatic reconnection with our numeric keypad. It swiftly pairs with your last-used device upon start-up, eliminating setup time. This lightweight keypad is universally compatible, making it a perfect choice for multi-platform users who value efficiency. Designed for Numerical Input: Tailored for users who demand efficient numerical entry, our wireless numpad transforms your laptop into a productivity powerhouse. It provides a smooth and rapid typing experience that can significantly elevate your numeric data entry tasks. Dual Compatibility and Multi-Device Connection: Our number pad is designed to enhance your work efficiency, supporting both for Mac and for Windows systems. With its wireless and Bluetooth-Compatible connectivity options, you can effortlessly link and transition between three devices at once, offering unparalleled flexibility in your workflow.