Product Introduction: Product name: G1 Certification model: BH21G1A Pair name: QCY-G1 Bluetooth version: 5.2 Compatible system: iOs/Android Communication distance: 10m Service time: about 4.5h; Music: about 8h; Play for about 6 hours (game mode on) Support protocol: HFP/HSP/A2DP/AVRCP Charging cabin capacity: 450mAh Charging times of charging cabin: about 3 times for both ears Charging interface type: Type-C Packing list: Headphone and charging chamber X1+ear cap * 3 pairs of S/M/L (including one pair of headphones)+instruction manual X 1+Type-C charging cable X 1