Upgraded BT5.0, 15M connection distance, improve the compatibility and fluent play largely, more stable signal and faster connection speed. Stereo HIFI surround high quality sound, support binaural independent connection, the earphones can be used separately. Automatic start up and pair BT devices after take it from charge box. Automatic disconnecting after put it in the box, more convenient to use. Built in 500mAh large capacity battery, with long standby time and intelligent quick charge, the standby time up to 72 hours. Smart fingerprint touch control, multifunctional one-key control, to answer or hang up the phone, play or pause the song, turn on or turn off the earphone.