BJBJ A3 PRO(ANC ENC) 30dB True Wireless Noise-cancelling Earphones

Bluetooth:V5.3
Talk Time:4H
Stand-by Time:140 Days
Earphone Charging Time:1.5H
Case Charging Time:2H
Charging Voltage:DC 5V
Transmission Distance:10-15M
Earphone Music Time:5-6H
Freguency Range:20-20000Hz
Earphone Battery:33mAh
Charging Case Battery:300mAh