1. This product is a self-timer used in the phone's Bluetooth remote control without having to install any software to use for IPOD / IPHONE / IPAD i9220 / i9250 / i9300 / i9500 / i9190 / note2 / note3 and some other Android 4.1 more systematic brand mobile phones. Other Android phones can not be directly manipulated you can download camera360 software then open camera360 the camera settings the volume keys function key is set to take pictures can be used. 2. Containing CR2032 button batteries can take pictures up to more than 3000 copies. 3. Can be remoted self-timer in the case of unhindered up to 20 meters away. 4. With five function keys: switch Bluetooth pairing camera Android configuration IOS configuration. 5. Specification:Bluetooth Version 3.0 6. Transmit frequency:2.4GHz~2.4835GHz