Case plugs into USB.
Includes two hearing aids and three pairs of different sized tips. Easiest To Use Rechargeable Hearing Aids Unlike similar models that cost three or four times as much, these units have active noise reduction to minimize non-voice sounds such as air conditioners, fans, and traffic and four different environment settings (standard, restaurant, outdoor, music). The hearing aids also have a discreet in-canal design that allows them to be discretely worn.