<These beautiful cheap devices have helped thousands of hearing problem people>
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 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
Package: 1 x Ear sound amplifier 3 x Earplug of different size 3 x Batteries 1 x Retail box