Truly waterproof hearing aids are rare devices. They aren’t completely nonexistent, but there is only one model. The only truly waterproof hearing aid is the JH-D19 made by JINGHAO MEDICAL. This model is completely waterproof and dustproof.
[IPX7 waterproof]- hearing aids inner Nano-coating makes it possible to waterproof for 1 meters deep for 30 minutes. It is suitable for sports to prevent water. Ideal for sweating it out at the gym.
It utilizes a completely waterproof and sealed housing and the battery door seals so tight water, dust or perspiration cannot get through. This means no seams, no cracks, and no way for water to penetrate.
A silicone seal keeps water from entering the battery compartment. Because zinc air batteries need oxygen, a semi-permeable membrane keeps water out but allows air inside.
It has been certified to withstand submersion at a depth of one meter (a little over three feet) for 30 minutes.
That is enough waterproof protection to allow you to swim, shower or splash at the beach without worry. If you engage in vigorous water sports, you can use a sports clip to keep it firmly in place.