Bluetooth version:V5.3
Stand-by time:140 days
Talk time:3.5 hours
Music playtime:5.5 hours
Charging time:1.5 hours
Charging voltage:DC 5V
Frequency range:20-20000Hz
Transmission distance:10m-15m
Battery capacity:33mAh
Charging case:320mAh
A97 Pro TWS Earbuds
3rd Floor, C Buliding,Yijietong Industrial Park, Hangcheng Avenue, Nanchang Community, Xixiang, Bao'an District, Shenzhen, China