iHEAR matriX OTC Hearing Aids Set.Premier Technology. Stream the crystal-clear sounds of your environment to your ears. You can also pair the device to your phone to stream music & make hands-free phone calls with the built-in microphone.- Full audio streamingamplification + Bluetooth headset.- Receiver in Canal: great for amplifying high frequency sounds like birds & higher pitched voices.- Personalize to your needs with the MyiHEAR app. – Directional microphones. – Customize your sound environment with 4 programs & 11 volume levels. – Rechargeable with portable charging case.- Premier digital feedback suppression.- Premier background noise reduction. – Crystal-clear digital sound. – Magnetic snap charge dock.