Bluetooth version V5.2 Audio codecs SBC Driver unit Φ10mm dynamic driver Playback time about 7 hours (earbuds) + 21 hours (charging case) Charging time about 1.5 hours (earbuds) Battery capacity 40mAh (earbuds)/400mAh (charging case) Frequency response 20Hz-20kHz Sound pressure level 100dB Impedance 32Ω Charging port USB Type-C