Bluetooth chip: AC6963 Bluetooth version: V5.2
Transmission distance: ≥ 10m
Speaker diameter：Φ13mm
Drive unit: ∅ 13mm
Audio decoding: AAC
Frequency：20Hz-20KHz
sensitivity：-42dB±2dB
Playing time:4H
Charging bin battery capacity：280mA
Earphone battery capacity：30mA Headset charging time: about 1.5 hour
