Solidtek KB-3152B-BT. Device interface: Bluetooth. Frequency band: 2.4 - 2.4835 GHz, Wireless range: 10 m. Keyboard dimensions (WxDxH): 103 x 222 x 21 mm, Keyboard weight: 0.2 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: 222.2 mm (8.75 "), Height: 20.8 mm (0.82 ")