❃【Plug and Play】The dimensions of numeric keyboard is 4.9 x 3.2 x 0.7inch, just as big as a phone. plug the wireless receiver and press the NUM key on the keypad and wait a couple seconds. Provides a cable-free & clutter-free connection, no device drivers are required，which is super convenient. | ❃【Low power consumption design】The number keypad wireless will automatically go into power-saving mode after several minutes of inactivity. Press any key and wait a couple seconds to wake the usb number pad for laptop.Powered by 1 x AAA battery (Battery is not included) | ❃【Broad compatibility】18 Key Mini Portable keyboard is compatible with Laptop, Desktop, PC Notebook,IOS, Windows XP, Windows Vista or Windows 7, USB port.The compact size allows it to perform as usual in any working environment without interference. | ❃【Wireless control range】The remote control distance of this numeric keypad is within 10 meters (33 feet). Please note that there may be slight differences in the wireless control range due to interference or different device settings. | ❃【Quality Assurance】In order to let you rest assured, we will provide a 12-month quality guarantee from the date of purchase. If you have any questions during use, please feel free to contact us.