1. Support Bluetooth V4.1+EDR technology. 2. Built-in Microphone: supports hands-free calls 3. Built-in 70mAh battery, low power dissipation, long working 4. 180 degree adjustable ear-fit design allows you to adjust the angle to fit on your right or left ear. 5. You could also move the boom mic up and down,this make it very easy for people to tell if you are on a phone call or not. 6.Battery: Li-poly 70mAh battery 7. Work with most of Bluetooth enabled devices, such as Android phones, iPhone, iPad, and other mobile phones, tablets, computers, etc
