Sell New Hearing Aid Sound Amplifier Hearing Device Sound Enhancer Ear Care Ear Health best price

New Best Digital Tone Hearing Aids Aid Behind The Ear Sound Amplifier Adjustable 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 ***WITHOUT BATTERY*** 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