hearing amplifier for seniors adults noise-cancelling - elderly listening assistance device products invisible voice sound amplifiers hearing aid cleaning brush included (dark blue) brefonak <b>hearing amplifiers for seniors and adults</b><br>material:medical resin<br>size:1.8*1.2cm<br>color : red for right ear ,blue for left ear<br><b>how to reduce feedback for this hearing amplifier?</b><br>1. ensure the ear dome fits snugly in your ear canal, if it is too loose, replace with a larger ear dome.<br>2. please make sure the pulling line is below, and the volume button/dial is above when you wearing it.<br>3. turning down volume.<br><b>package( for one ear)</b><br>1 x hearing amplifier<br>6 x different size ear domes<br>1 x cleaning cleaning tools brush<br>3 x earwax guard<br>1 x manuel<br>1 x case<br>package provide detailed wearing process, and possible problems and corresponding solutions.<br><b>if you have any questions during use, please feel free to contact us, our team will provide you with professional responses within 12 hours.</b>