Logitech K750. Device interface: RF Wireless, Purpose: PC, Recommended usage: Office. Frequency band: 2.4 GHz. Wireless receiver interface: USB. Mac operating systems supported: Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion. Power source type: Battery, Solar