Product information:

Specification:
Convenient to carry
Low noise, low distortion;
For people with severe hearing loss;
The product uses hearing aid devices.
The extent of gas conduction hearing disorders.
Taboos otitis media or ear discharge that is deactivated.
Characteristics:
Maximum sound: 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 cable plug is connected to the headset. Then, ear plug connector (hard) to headphones, ear plugs (silica gel) connect the headphone jack pedestal
Battery Installation: Carefully open the cover, put an AG13 / LR44 battery into the battery compartment in the right direction, then close the battery compartment.
Before using this, you have to turn off the OP and turn the sound volume to minimum.
Then put this item in your ear, keep it tight
Then turn on this item (O-N to N), the volume until it sounds.

Packing list:

Hearing aid*1