MG-G21 Bluetooth 4.2 Sport Wireless Bluetooth Earphone, Support Card(Black Red)

Bluetooth version: jerry Bluetooth V4.2 Transmission distance: 10 meters Usage time: 4 hours Standby time: 4-6 minutes automatic shutdown Battery: 65mAh rechargeable lithium battery Function: adjust the volume, switch songs, call Listen, reject, hang up, play bluetooth, Phone replay, bluetooth back connection, voice prompt, battery Display, to telegraph number, intelligent shutdown, pure English broadcast