The Kidde 21007268 Battery Operated Nighthawk DC Carbon Monoxide Alarm features an efficient design that lasts 40% longer than traditional CO alarms. This is a great way to provide reliable protection to your family from the dangers of carbon monoxide, which can go unseen, tasted, or smelled. The battery operated alarm comes with 3 AA batteries, is easy to install, and boasts a sleek design that looks great in all living areas. Additional Features Type: 3 AA batteries Alarm Type: Carbon monoxide Use: Residential About Kidde In the business for over 90 years, Kidde is the world"s largest manufacturer of fire safety products. Industry leaders, the military, airlines, firefighters, and countless families rely on Kidde for fire detection and suppression every day, so they take their products very seriously. They"re based in Mebane, NC, and are a division of the larger UTC Fire & Security. To protect your family and home from the dangers of fire, count on a Kidde. Battery operated carbon monoxide alarm. Test/rest button, end-of-life alert. Meets UL requirements. 7-year limited warranty. Includes 3 AA batteries.