LipiWorld® Mini Numeric Keypad 2.4GHz Wireless 18 Keys Pad for PC Laptop Description Compact,comfortable to use and easy to carry Help you tohandle with numbers more professional and efficiently wherever and whenever Keyboardcomes with 18 keys of 0-9 number keys, Del, Enter, Num Lock, Backspace, + - * / Simple plugand play, no driver installation requirements Wirelesstransmission, fast and sensitive, up to 10-meter working range Best forNotebook users who always work with number keys / mini digital keyboard "NumLock" key, switch to the number(0-9) function and other functions. Specification: Item Name:Wireless Numeric Keypad Number ofKeys: 18Keys Interface:Wireless 2.4G Voltage: DC1.5V Color: Black CaseMaterial: ABS OperationRange: 10M (Without signal disturbance and no direction limit) Power: 1*AAABattery (Not Included) SystemSupport: Windows XP/7/8/Vista, Linux, Mac os 9 etc. Package: 1pcs *Wireless Numeric Keypad 1pcs * USB Receiver (*PackageWithout Battery)