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: ≥ 50dB?? ?

Total harmonic distortion: ≤ 5%? ?

Frequency range: 300Hz ~ 40000Hz?? ?

Input Noise: ≤ 30 dB?? ?

Operating voltage: 1.5V?? ?

Battery model LR44

Current: ≤ 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 O-N switch to O(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