Solidtek KB-3962B-BT. Device interface: Bluetooth. Frequency band: 2.4 - 2.4835 GHz, Wireless range: 10 m. Keyboard dimensions (WxDxH): 197 x 291 x 24 mm, Keyboard weight: 0.635 kg. Operating temperature range (T-T): 0 - 50 °C, Storage temperature range (T-T): -20 - 65 °C. Compatible operating systems: Windows 98, ME, 2000, XP, Vista, Depth: 291.1 mm (11.46 "), Height: 23.6 mm (0.93 ")