Hearing Aid Mini Digital In Ear High Quality Adjustable Sound Small CIC hearing aid Adsound hearing amplifier

Hearing Aid Mini,Digital In-Ear hearing aid,High Quality invisible hearing aid,Adjustable Sound amplifier,Adsound hearing aid mini,CIC hearing aid,Adsound Product Mild and moderate Invisible Hearing Aid Technical data IEC 60118-7/ANSI S3.22-2003 Model G-16 Peak OSPL 90 ( dB SPL) 115dB Sound gain ?30dB Total harmonic wave distortion ?5% Frequency range 300-4000Hz Input noise ?40dB Zinc air battery Size A10 Power consumption 1.5V DC, current: ?5mA Power switcher yes, on/off Battery working working day time 7-10 days Packing color box: 3.5*3.5*2 cm/unit, gross weight: 50g/unit Certifications approved CE, FCC and RoHS Directive-compliant, and the FDA 2017 FAQ: Question 1: Why there is the whistling sound? Adsound Answer: 1. The ear plug is too small. 2. The ear plug is not really inserted into the ear canal. 3. The sound tube isn't connected tightly with the ear plug. 4. The sound tube isn't connected tightly with the ear hook. Question2: Why there is noise? Adsound Answer: *If you hear noise, it may be the sound of the current, which needs time to adapt to, please understand. *If you increase the volume, the sound of current will also be increased more obviously like the sound of wind. *If it still can not help, please try to switch the programs for didital items. url:http://www.byvisiontech.com