Vankey Wireless Numeric Keypad, 18 Keys Mini Keyboard Numpad 2.4G USB Number Pad for iMac Macbook Windows Laptop Notebook Desktop PC Computer Effective Range: This number keypad is up to 32ft working range. Operating frequency: 2.4 G technology. Plug-n-Play: No device drivers are needed.Floating keyboard makes it easy to touch and type.Smooth flowing touch and non-slip by the rubber pad. Slim Design: 2.4Ghz built-in mini USB nano receiver for dustproof.Need an AAA battery (included in the package). BIG numbers and responsive keys to easily use. Portable size: 18-key Wireless Numerical Keyboard.Hibernation mode enables automatically, no power button needed. What You Get: Vankey USB Wirless Keypad, Nano Receiver, AAA battery , User Manual.