Mini bluetooth keyboard for iPad, iPhone, Windows and Android
Built in Li-ion battery, rechargeabe via USB cable.                                                               
 LED for bluetooth connection                                  
Bluetooth V3.0, support Apple, Android & Windows system                                                    
2) Electrical specification ﹕
  A. Working  frequency: 2.400GHz-2.483GHz
  B .Working distance: 10m
  C.Battery: Polymer lithium ion battery (3.7V)(volume:180MA)
 D.Charging time: 2 hours, Uninterrupted working time: 100-hour                                                                E.Standby 90 days
F. Working current: <2mA    3V
G. Sleeping current: <50uA    3V
H. Sleeping mode: The keyboard automatically enter sleep mode when you are not using in 20 minutes.
I. Sleeping waking way: To press any key