New Best Tone Hearing Aids Aid Kit Behind The Ear Sound Amplifier Sound Adjustable Device

Specification:
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
Weight: 74g
 

Instructions:  
The wire plug connected to the headset.Then earplug connector (hard) to the headset， earbuds (silica gel) to connect to the headphone connector pedestal  
The battery installation: Gently open the battery compartment cover， put a AG13/LR44 battery into the battery compartment in the right direction， then close the battery compartment .
Before you use this item ，you have to turn the ON switch to OFF，and turn the sound volume to minimum
Then put this item on you ear， keep it tightly
Next， turn this item on(O-N to N)， adjust the volume until you hear clear sound

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