Description: Up to 32 feet working range Plug-n-Play: No device drivers are required. Compact size 18-key wireless numeric keypad. Easy to carry and store. With built-in mini receiver. An AAA battery is needed for the keypad to work. Compatible with : Windows for PCs and OS X system Features:Effective Range:19-32 feet / 6-10 MetersOperating frequency: 2.4 GHz technology Package:1 x Wireless Keypad1 x 1 x 2.4G wireless adapter