The Sontro Hearing Aids Use Directional Microphones And Advanced Signal Processing To Manage Noise Coming From Different Directions * This Feature Called Adaptive Directionality Allows You To Follow Conversations Easily With Your Hearing Aids * The Sontro Hearing Aids Process Sound Using A Sophisticated Technology Called Wide Dynamic Range Compression To Help Expand Your Hearing Range Across 16 Channels * It Makes Soft Sounds Louder And Loud Sounds More Comfortable Giving You Easy Listening And Great Sound Quality * The Sontro Hearing Aids Intelligently Monitor Your Environment And Automatically Select The Most Appropriate Sound Mode To Help You Hear Your Best In Every Listening Situation Allowing You To Move More Seamlessly From Quiet To Noisy Listening Situations * Our Behind-the-ear Hearing Aid Uses Receiver-in-the Canal Technology (ric) For Best Sound Quality. Built For Your Active Lifestyle They Are Durable And Sweat Resistant. And Best Of All They Are Small Comfortable And Designed To Easily Hide Behind Your Ear.