Product name
Portable hearing aid medical device
Battery
Rechargeable Li-battery
Max Sound Output
≤107dB±3dB
Average sound gain
38dB±3dB
Frequency Range
500-4000Hz
Equivalent input noise
≤25dB+3dB
Total har-monic wave distortion
≤ 7%
Charging time
full charging, used for about 500 h