Product name: Color screen smart multi-functional headphonesProduct model: YX30Product color: black/whiteProduct chip: Jerry 7003D8 noise reductionWorking frequency: 2.402-2.480GHZWeight: 68.5gBluetooth version: 5.4 【Binaural call】Transmission distance: 15M 【Accessibility】Charging compartment battery: 500mAHHeadphone battery: 30 mAhWorking time: about 5.5 hours of continuous playback at 100% volumeCharging time: 1H