Features:1.Bluetooth:Using the latest CSR4.2+EDR Bluetooth technology,superior signal transmission, ultralow power consumption.2.Function:all Bluetooth devices, automatic answering function, switchable manual answering phone function.3.Safe and fast:builtin high quality antiinterference microphone It can effectively realize handsfree 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:blackBluetooth version: V4.2+EDRStandby: 120HoursTransmission distance: 10MMIC distance: 1 meterLithium battery: 500mAhPackage Included:1set* Headphone+USB cable+Ears caps+manual