Avanca Two-zone for Mac. Device interface: Bluetooth, Purpose: iPad, Recommended usage: Home. Bluetooth version: 2.0+EDR, Frequency band: 2.4 GHz. Keyboard dimensions (WxDxH): 365 x 132 x 195 mm, Keyboard weight: 450 g. Mac operating systems supported: Mac OS X 10.5 Leopard. Power source type: Battery, Keyboard battery type: AAA