Interface connection: Bluet00th Power Type: Lithium Ion Battery Li-ion battery capacity: 140mAh Charging: yes Working voltage: 3.7V Standby current: 0.25mAh Use key working current: <3mA Working current with touchpad: <8.63mA Working distance: <15m Button material: ABS Wake mode: any key Sleep time: 10 minutes Keyboard layout: 63 keys System Compatibility: window, Android, iOS Suitable for: mobile phones, tablets, etc.