Bluetooth version V5.0 Audio codecs AAC, SBC Driver unit 40mm dynamic driver Playback time ANC on: about 29 hours; ANC off: about 49 hours Charging time About 1.5 hours Battery capacity 400mAh Frequency response 20Hz-40kHz Sound pressure level 91±3dB SPL Impedance 32Ω Charging port USB Type-C