Fangrui Product Details 1. Car Mobile Phone Remote Control Bluetooth Wireless Multimedia Button Remote Control Music Playback Selfie, Colour: Black With Buckle 2. Material: Abs 3. Power Supply: Contains 3 Button Batteries 4. Bluetooth Version: 4.0 5. Scope Of Application: Bluetooth Headset, Computer, Mobile Phone, Car Navigation, Etc. 6. Effective Distance: About 10m 7. Applicable Scenarios: Cars, Motorcycles, Bicycles, Etc. 8. Power Supply: With Cr2025 Button Battery 9. Compatibility: Ios 7.0android 4.4+ 10. Size: About 3.6x0.8 Cm 11. Weight: About 22 Grams 12. Features: 13. Connect To Mobile Phones Or Tablets Via Bluetooth, No Additional Software Installation Is Required 14. Press The Volume Button To Remotely Control The Camera Shutter, Making Selfies More Natural 15. Bluetooth Effective Control Range Is About 10 Meters 16. If The Button Is Not Operated For 30 Seconds, The Connection Will Be Disconnected And Enter The Sleep Mode. At This Time, Press Any Button To Wake Up And Automatically Reconnect 17. With Soft Light Backlight, It Is Convenient To Use When The Light Is Dark 18. Incoming Call Voice Report Number Reminder, Hands-free Call, Convenient And Fast