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 Samsung i9220 / i9250 / i9300 / i9500 / i9190 / note2 / note3 and some other Android 4.1 and higher mobile phones. If it doesn’t work on your Andriod cellphone you can download camera360 software then open camera360 camera settings and set the volume key as controlling button. 2. Containing CR2032 button batteries can take pictures up to more than 3000 copies. 3. Max. range: 20m 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 7. Self time frame weight is only 130g 22~100cm adjustable length; portable to carry lightweight and flexible. 8. Suitable for a standard digital camera tripod mounting holes such as common SLR cameras. Mobile phone clip: 55MM-85MM (3.5 inch -5.8 inch phone).