1、Precise Control: Numpad is made of high quality ABS material, which is comfortable to touch, precise control, good elasticity, fast reply, and reduces pressing sound. 2、Bluetooth Technology: The digital keyboard adopts Bluetooth technology, you only need to pair with Bluetooth to use, which is convenient and quick to use. 3、Shortcut Keys: The numeric keyboard supports shortcut keys such as NumLock, ESC, Tab, Delete, etc., which can directly open the computer calculator. 4、Fast Data Transfer Speed: no device drivers, no delay and loss, fast data transfer speed, simple operation, convenient for your use. 5、Automatic Sleep Function: Numeric Keypads also have automatic sleep function to reduce power consumption and reflect energy saving. Press any key to wake up the keyboard. Item Type: Numeric Keypad Bluetooth Material: ABS Working Distance: Approx. 10meter / 10.9yd Sleep Current: <10μA Battery Specifications: 2 AAA Batteries (Not Iincluded) Support System: For ANDROID, for WIN, for IOS 1 x keyboard 1 x User Manual