K7 Active Noise Cancellation TWS Earphone

PAU1623 (dual-micphone call noise reduction)
Speaker: 10mm
Impedance: 32Ω±10%
Microphone sensitivity: -42±3db
Frequency response: 20~20000Hz
Transmission range: 10 meters
Charging voltage: DC 5V
Charging time: about 2 hours
Talk time: about 4 hours (70% volume)
Music time: about 4 hours (70% volume)
Standby time: more than 90 hours
Battery capacity: 40mah *2
Charging bin capacity: 350mah

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