The product is a 6-pack of Size 10 Zinc-Air Hearing Aid Batteries by powerone, with each battery providing 100mAh of amp hours and a voltage of 1.45V. The batteries have an expiration date of 2019-05 and come with a quality guarantee from the manufacturer. Designed for daily living aids in the health and beauty category, these batteries are specifically tailored for hearing assistance and mobility.  I have 10 packs and I’m selling them as a unit