Product Feature: 360 degrees rotating design, suit for left and right ear.bluetooth V5.0 chip,stable singal transmission.Bluetooth transmission distance: 10 meters.Creative hook design and only 14g weight,stable and comfortable.Support adjust volume and change musicCapacity: 220mAhNoise Reduction: CVC 6.0Working voltage: 3.7VCharging voltage: DC5VCharging Time: about 1 hoursTalking time: about 20 hoursMusic time: about 15 hoursStandby time:about 480 hoursFrequency response: 20 - 22kHzProducts include1 * Bluetooth headsets1 * Charging cable1 * User Manual1 * Ear cap