5ive HRH-338 Bluetooth 3.0 Wireless Phone Tablet Music Camera Controller Remote Shutter for IOS Android Systems (Green) Built-in lithium battery, can take many pictures. When connect the phone bluetooth,can control the phone camera in 10m without any obstruction. Adjust the focal length, with amplification and narrow functions. The shutter is small enough to have with you on your keychain or hand rope whenever you need it. Can be connected to the bluetooth speakers and control the mobile music playback function.