Solidtek KB-573. Device interface: RF Wireless. Wireless range: 7 m. Keyboard dimensions (WxDxH): 167.132 x 338.07 x 27.94 mm, Keyboard weight: 598.74 g. Battery type: AA, Current consumption: 250 mA. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -10 - 60 °C