Leadrise 2.4GHz Wireless 18 Keys Number Pad Numeric Keypad Keyboard for Laptop Desktop PC Up to 32 feet working range, With built-in mini receiver Plug-n-Play: No device drivers are required Hibernation mode enabled automatically, no power button needed Compact size. 18-key wireless numeric keypad. Easy to carry and store Scope of application: all systems (MAC system is not fully applicable)