100% brand new and high quality
<br />Material: ABS
<br />Color:  As the picture shows
<br />Features:
<br />Convenient wear
<br />Low noise, low distortion;
<br />For people with severe hearing loss;
<br />Product use hearing assistive devices.
<br />The scope of application of gas conduction hearing disorders.
<br />Taboos otitis media or ear suppuration who are disabled
<br />Specification：
<br />Maximum sound output: 130 ± 5dB 
<br />Sound gain: ≥ 50dB 
<br />Total harmonic distortion: ≤ 5% 
<br />Frequency range: 300Hz ~ 4000Hz 
<br />Input Noise: ≤ 30 dB 
<br />Operating voltage: 1.5V 
<br />Battery model LR44 
<br />Current: ≤ 4mA
<br />The wire plug connected to the headset.Then earplug connector (hard) to the headset, earbuds (silica gel) to connect to the headphone connector pedestal
<br />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 .
<br />Before you use this item ,you have to turn the O-N switch to O(off),and turn the sound volume to minimum
<br />Then put this item on you ear, keep it tightly
<br />Next, turn this item on(O-N to N), adjust the volume until you hear clear soun
<br />Quantity:1Pc
<br />Note: Due to the difference between different monitors, the picture may not reflect  the actual color of the item. Thank you!
<br />Note: If you hear a howling，check the ear (silica gel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage. 
<br />Use for long periods of time, please remove the batteries to prevent battery rot erosion hearing aid components. 
<br />Please regularly clean the ear plugs or ear molds in order to ensure the normal use of hearing aids. 
<br />Avoid shock, drop, moisture, and high temperature.