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.