Air Pro 6 TWS Wireless Bluetooth HeadphoneBluetooth specification: V5.0Bluetooth Profile: A2DP, AVRCP, HFP, HSPWorking voltage: 3.1V to 4.2VCharging voltage: 5V-1ABattery capacity of the headset: 40MAHBattery capacity of the storage box: 300mAhTransmission distance: >10MCall time: 4-5 hPlaytime: ..