Specifications: Brand: RAAATCO Model: BT KB with TrackPad Bluetooth: Bluetooth 3.0 interface standard. Color: Black Battery Capacity: 200 mA Uninterrupted Working Time: 100 hours Operating Distance: Within 4 meters Standby Time: over 10 days Charging Current: over 200 mA Charging interface: Micro USB Charging Time: 3-4 hours Key life: 5