The product is a pack of 8 Rayovac Crystal Clear Hearing Aid Batteries in Size 13 (orange), designed for both ears. These batteries are of zinc-air chemical composition and have a voltage of 1.45V. With an expiry date of 2028 or after, they are CE certified and feature a replaceable battery for convenience. The Rayovac brand is known for its quality and reliability in the hearing aid industry, making these batteries a trusted choice for those in need of daily assistance with their hearing.