The product is a pack of 9 Rayovac Extra 312 hearing aid batteries. These disposable batteries are designed for use in hearing aids and have a voltage of 1.45V. They are made with a zinc-air chemical composition, providing reliable power for your hearing aid. The size 312 (Brown) batteries are easy to handle and provide a long-lasting power supply for your daily use. Ideal for those in need of a dependable and convenient solution for their hearing assistance needs. Husband changed aids which dont take 312 batteries
