An image of the Phonak Audeo Marvel 312 hearing aid on a white background with red label on top that writes Sale!

The Phonak Audeo Marvel 312 M30 hearing aid is the device in the range that uses the size 312 hearing aid batteries. The hearing aid has Direct Bluetooth connectivity with any mobile device including iPhone and Apple devices as well as Android mobile devices and other Bluetooth capable accessories for a true hands-free phone call and seamless streaming experience.