Maximum sound output: 119 ± 5dB
High-frequency average OSPL90：110±4dbB
Maximum sound gain: 38dB ± 5dB
Total harmonic distortion：≤3%
Frequency range: 500Hz-5000 Hz
Equivalent input noise level：≤29dB
Working current≤2mA

1. Typle-C charging, four sound adjustments
   2. Have charging indicator light
   3. Imported chips, intelligent noise reduction
   4. Soft silicone, and the ear hooks are designed with a humanized arc, comfortable and painless to wear for a long time
   6. hearing Aid Working time:35 Hours,
   Charging time:2 Hours.Charge box can charge two hearing Aids 5 times after charge full.
   7. Dont have left and right ear limit.
   8,4 mode for noise reduction