BJBJ A68 Pro 30 dB True Wireless Noise- cancelling Earphones

Bluetooth version:V5.4
Stand-by time:140 days
Talk time:4 hours
Music playtime:6-7 hours *3Times
Charging time:1.5 hours
Charging voltage:DC 5V
Frequency range:20-20000Hz
Transmission distance:10m-15m
Battery capacity:33mAh
Charging case:300mAh