Bluetooth name: TWS895 Bluetooth version: V5.0 Transmission distance: 10 meters Frequency range: 20Hz-20KHZ Support protocol: A2DP, AVCTP, AVDTP, AVRCP, HFP, SPP Single play time: about 3 hours Charging time in the charging compartment: about 2 hours Charging bin capacity: 150mAh Waterproof rating: IPX5