Product number:E6S Bluetooth version:Bluetooth V5.0 .Battery specification: Headset 3.7V/45m Ah: Charging box 7V/280mAh Support mode: HFP/HSP/ A2DP/AVRCP Sensitivity: 105dB+ 3dB S P L at 1KHz Transmission distance: 10 meters(in an ideal environment without any major obstacles) Play time: About 2.5 hours Call time: About 3 hours Standby time: About 80 hours Charging time: Charge the charging compartment for about 1.5 hours and charge the headset for about 1 hour Charging box to charge the headset: About 2.5 times Package list: 2xBluetooth earphone 1xEndurance charging box 1xcharging cable 1xUser’s manual 1xEarplug silicone cap