Features: 1.Bluetooth:Using the latest CSR4.2+EDR Bluetooth technology,superior signal transmission, ultra-low power consumption. 2.Function:all Bluetooth devices, automatic answering function, switchable manual answering phone function. 3.Safe and fast:built-in high quality anti-interference microphone It can effectively realize hands-free answering and hang up calls. High fidelity sound , support last song or next song function, volume addition and subtraction, playback pause, automatic callback and other functions, easy to operate. Specifications: color:black Bluetooth version: V4.2+EDR Standby: 120Hours Transmission distance: 10M MIC distance: 1 meter Lithium battery: 500mAh Package Included: 1set* Headphone+USB cable+Ears caps+manual