Bluetooth version: 5.4 Support protocols: A2DP, HFP, AVRCP Battery capacity: 35mAh*2 (without protection board but IC) Battery capacity of charging case: 400mAh (with protection board) Charging time: 1.5H Talk time: 6H Play time: 6H Standby play: 400H Horn parameters Diameter: 13mm Sensitivity Impedance at 1KHz Mic parameters Sensitivity Impedance Maximum transmission distance: 10M Bandwidth: 100KHz-5KHz Voice prompt: supported Multi-point connection: unsupported Wearing method: in ear User manual English Type-C Waterproof rate Key Features Bluetooth vertsion Speaker size 13mm Battery 3.7V,35mAh Charging time 1.5 hours Power bank battery 400mAh Playtime 6h Talktime 6h Volume 60% What’s in the box ONE PAIR WIRELESS EABUDS