Product information: Bluetooth version: Bluetooth V5.3 Use time: about 5-6h Headphone battery capacity: 40 mAh Charging compartment battery capacity: 300 mAh Bluetooth distance: 10M Binaural call: support Speaker unit: 13MM composite moving coil Headphone charging time: 45min Charging time of charging box: 1.2h Sensitivity: 98dB Charging interface: TYPE-C Frequency response range: 20Hz-20KHz Packing list: Bluetooth Earphones*1 Product Image: