1. With 1/4" universal screw 2. Suitable for GoPro Camera, Digital Camera, DV Camera, Entry Level DSLR Camera, Mobile phone etc. 3. Equipped with Bluetooth remote control, easy to operate with mobile phone. 4. Compatible with Android 4.2.2 OS or newer and iOS 6.0 or newer 5. Bluetooth version: 3.0 6. Transmit frequency: 2.4GHz-2.4835GHz 7. Communication distance: 10m (30ft) 8. Battery life (1 x CR2032): about 6 months under working in 10 times a day 9. Cell phone Clip width: 5.5-8cm