BJBJ A97 Pro TWS Earbuds Wite Smart Digital Display

Bluetooth version:V5.3
Stand-by time:140 days
Talk time:3.5 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