HDI Dune HD Qwerty. Device interface: RF Wireless, Keyboard integrated devices: Touchpad, Keyboard layout: QWERTY. Frequency band: 2.4 GHz. Wireless receiver interface: USB. Keyboard dimensions (WxDxH): 167.5 x 65.5 x 12.5 mm. Power source type: Battery, Battery technology: Lithium-Ion (Li-Ion)