Soucingbay Hands Free Motorcycle Helmet Intercom Stereo Bluetooth Headset for Mobile Phones iPhone Samsung Galaxy S5 S4 Note 3 S3 Main functions: the phone/hang up/redial/volume Automatically and safely receive phone calls Mono bluetooth headset More than 7 hours for continuous talk or listening to music bluetooth 3.0, four hours of talk time, about 100 hours of standby time, can control the ear any belt.Bluetooth 3.0 + EDR, support for all bluetooth mobile phone!