Zoom ZDTV Wireless Keyboard 9006. Device interface: RF Wireless. Frequency band: 2.4 GHz, Wireless range: 9.1 m. Wireless receiver interface: USB. Keyboard dimensions (WxDxH): 279 x 112 x 18 mm, Keyboard weight: 281 g. Power source type: Battery, Battery technology: Alkaline, Battery type: AAA