Razer BlackWidow. Device interface: USB, Purpose: PC, Recommended usage: Gaming. Keyboard weight: 1400 g. Mac operating systems supported: Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Minimum hard disk space: 75 MB. Power source type: USB. Depth: 171 mm, Height: 30 mm, Width: 475 mm