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 plug and 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. Specifications: Item Name:Wireless Numeric Keypad Number ofKeys: 18Keys Interface:Wireless 2.4G Voltage: DC1.5V Color: Black Case Material: ABS Dimension:14.5*8.7x2.7 cm KeycapsLife: More than 10 million times OperationRange: 10M (Without signal disturbance and no direction limit) Power: 1*AAABattery (Not Included) SystemSupport: windowns98/95/NT/ME/2000/XP/Vista/7.0/8.0 Specifications: 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 plug and 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. Package Included: 1pcs * Wireless Numeric Keypad(battery is not included) 1pcs * USB Receiver