You will receive 2 brand new Energizer CR1620 3v lithium batteries. Expiration is 2033. (Dates on back will show PD (production date, and ED expiration date). Size: 0.63" Dia x 0.08" H (16.0mm x 2.0mm) Replacement battery for car remotes, RKE (remote keyless entry), watches, fitness and healthcare devices, and other fine electronic devices. Panasonic Lithium Battery CR1620. Panasonic is a worldwide leader in small electronics batteries. Panasonic offers a full line of Watch Electronic Specialty Batteries for applications used in precision engineering tools to power a wide variety of small electronic devices. Panasonic batteries are used in home health devices such as glucose monitors, blood pressure cuffs and digital ear thermometers. Also, button cells can be used in keyless remote entry systems for cars and homes. Hand held electronic devices also use batteries in calculators, watches, photo camera, computers, audio books, games, toys and more...