Peace be upon you There are internal hearing aids for both sides, right and left, for hearing loss. New, unused. Number of channels: 16 channels, and it is considered one of the strongest channels for sound clarity. The hearing aids are new and unused with all their accessories. They are suitable for all ages and for those with mild, moderate, and severe hearing loss. They have a programming feature that can be programmed according to the level of hearing loss. And for the serious buyer, God willing, we will not fall short with him.