Gright Wireless Bluetooth 3.0 Universal Pocket Folding Keyboard for Smartphones-Foldable Keyboard Supports Apple Ios/microsoft/android Systems Use Broadcom 3.0 chip, perfect performance and stable quality 2. Build-in 110mA Li-battery, sustainable for continuous 40 hours using Protective Case Doubles as a Stand,Compatible with Android & iOS Devices Docks Tablet Devices or Smartphones While in Use Micro USB charging cable, 4 hours full charging,Auto sleep if no use within 15 minutes 30 Days Standby Time,44-Hr Run Time&lt;,Convenient to CarryHigh quality silk printing on the keys, no faking for more than 5 million taps 8. The universal bracket within package can use as keyboard protector when fold up the keyboard; and use as bracket for tablet and smartphones when using the keyboard