Metal In Ear Bluetooth Headphones in Gold. Embedded microphone for hands-free conversation from Bluetooth-enabled mobile phones. Enjoy stereo music wirelessly from Bluetooth A2DP devices. We can Call transfer between the headset and Bluetooth mobile phone. Charging by USB micro 5 pin jack. it contains Voice control, Microphone, Answering phone, Noise Cancelling, Song switching, Bluetooth, Multi connection function and HiFi etc.