Very glad to see you in my shop. Product Feature: bluetooth V5.2 chip,stable singal transmission. Bluetooth transmission distance:10 meters. Support protocol:A2DP,HFP,SPP,HID,AVRCP Battery capacity more→of the headset:55mAh Working voltage:3.7V Charging voltage:DC5V Charging Time:about 1 hours Talking time:about 10 hours Music time:about 8 hours Frequency response:20 - 22kHz Product List: 1 * Bluetooth headsets 1 * Charging cable 1 * User Manual Wish you a happy shopping --------------------- Please note: The Bluetooth headset is not suitable for swimming, bathing, getting wet on rainy/snow days, soaking in water, etc. It can only prevent a small amount of sweat and water!! We