FREE: MD##Digital Tone Hearing Aids Aid Behind The Ear Sound Amplifier Adjustable

The listing, MD##Digital Tone Hearing Aids Aid Behind The Ear Sound Amplifier Adjustable has ended.

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Convenient wear
Low noise, low distortion;
For people with severe hearing loss;
Product use hearing assistive devices.
The scope of application of gas conduction hearing disorders.
Taboos otitis media or ear suppuration who are disabled.
Features:
Maximum sound output: 130 +_ 5dB
Sound gain: more than 50dB
Total harmonic distortion: less than 5%
Frequency range: 300Hz ~ 40000Hz
Input Noise: less than 30 dB
Operating voltage: 1.5V
Battery model LR44
Current: less than 4mA

1 pc