Bluetooth Version Bluetooth V5.0 Bluetooth Profiles A2DP, AVRCP, HFP, HSP Playback Time ANC On: about 7hrs(earbuds)+18hrs(charging case) ANC Off: about 9hrs(earbuds)+23hrs(charging case) Charging Time About 1.5hrs(earbuds) / 2hrs(charging case) Battery Capacity 60mAh(earbuds) / 500mAh(charging case) Response Frequency 20Hz-20KHz Sensitivity 94±3dB Impedance 24Ω