Bluetooth 2.0 interface (compliant with Bluetooth 1.0). Communication with smartphone device available. Certified for Telecom safety. Transmission range up to 10 meters. Ultra-thin Compact size and low power consumption. Bluetooth technology help you can easily to link any Bluetooth dongle and system. Ultra-flat scissor structure keyboard delivers smooth, super-quiet performance. Properties: Dimensions: 225 x 99 x 23.5 mm (upper by side view), Weight: 300 +/- 25 g, Key number: 83 keys (JA) / 82 keys (US/UK), Keyswitch type: Scissors, Wireless Technology: Bluetooth (Meets V 1.1./ 1.2. and HID Profile V 0.95C), Operation distance: 10 Meters, Channel: Channel:79 (2.4~2.4835GHz unlicensed ISM band/ Class II (under 4 dB), Safety Approvals: FCC,CE,Telecom. Battery: 2 x AAA (Alkaline), Operation System: Win 98SE, ME, 2000, XP, XP x64, Vista. Battery life: 3 months.