Call time: 6-8 hoursStandby time: 7-10 DaysCharging time: 1 hourBluetooth version: 5.0 versionTransmission distance: outdoor straight line distance 10-18 metersBattery capacity: polymer lithium battery 50mahCharging box battery capacity: 400mahListening to music time: 6-8 hours Up and down music / pause playbackCharging: 5V /500mAStandby current: 4uAStereo: YesEarphone Weight: 3.5GPackage include:1*tws wireless earphones(1pair)1*user Manual1*charging box1*charging cable1*retail package