U1 ANC Earhook TWS with Charging Case

PUA1603
Speaker: 13mm
Impedance: 32Ω
Frequency response: 20~20000Hz
Transmission range: 10 meters
Charging voltage: DC5±0.25V
Charging time: about 1.5 hours
Talk time: about 4 hours
Music time: about 4 hours
Standby time: more than 50 hours
Battery capacity: 50mah
Microphone sensitivity: -42±3db
Charging warehouse capacity: 500mah