iHEAR Xplore OTC Hearing Aids Set.Essential Technology. Easy to use with simple controls over your volume and program environment. Enjoy Four Different Programs to Suit Your Listening Needs: Quiet, Noisy, TV, Outdoors.- Easy to use – no app required. – Up to 43db of crystal-clear amplification.- 4 channel digital signal processor (DSP). – Directional microphones. – Customize your sound environment with 4 programs & 11 volume levels. – Rechargeable with portable charging case. – Essential digital feedback suppression.- Essential background noise reduction. – Crystal-clear digital sound. – Magnetic snap charge dock.