Method of application:
Play/Stop:Long-press for 3s: IOS start the "Siri";Andriod system simulates the phone by pressing the "Home button".
VOL+/Take photo:Long-press for 3s, IOS start the "Multi-task manager"
Next song: Long-press for 3s,IOS/Andriod is"Return to main menu"
VOL-/Take photo,Long-press for 3s: IOS start the "Multi-task manager"
Previous song,Long-press for 3s: IOS/Andriod id "Light up or off the phone's screen"
Product size:diameter 36mm,thickness 8.5mm
Compatibility:IOS7.0 or Android 4.4+
CCsky Bluetooth Car Kits Wireless SmartRemote Contorl Hands-free Portable Bluetooth Media Button for Music Shutter Siri Compatible with iPhone X/8/8Plus/Samsung/Nubia/LG/Tablets/iPad - B07BTSHKCG