Karnotech Wireless USB Receiver Keyboard 2.4Ghz Desktop Portable keyboard or Windows 7/8/10 Vista, XP, PC, Laptop VMK-24 (Black) Battery powered, requires 2 set of AA battery, easy to replace. Ultra-thin design. Scissors keyboard gives more comfortable touch feeling. Compatible with Windows-based laptop and desktop computers Windows 7 / 8 / XP / Vista The advance 2.4G wireless transmission technology, transmission distance reach up to 10 meters. Humanity button layout, consistent with conventional usage. 12 multimedia keys contain extra work & entertainment function.