via Bluetooth mobile phone or tablet, you can control the music player / pause / up and down song switch / volume up /supporting Siri, without additional software installation Press the volume button, remote control camera shutter, Selfie more natural Bluetooth effective control range of 10 meters Press the button for without operation to disconnect to enter hibernation mode, then press any key to wake up and automatically connect Equipped with CR2032 battery, intelligent power-saving, wake up 0.5 seconds, 2 years long standby Parameter: Product Size: Diameter 36mm, thickness 8.5mm Battery Type: CR2032 Compatibility: IOS7.0 or Android4.4 + Colour: Black Material: ABS Package Contents: 1x Smart remote control 1x stickers 1x manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.