The Kidde 900-0136-003 Ionization Nighthawk Smoke Alarm features a long-life, lithium power cell that"s guaranteed to last 10 years to give you less hassle and superior protection. The smoke alarm features a hush button for quickly silencing nuisance alarms, test button to verify operation, a flashing LED light with siren, and it installs without the need for any wiring. This is an ideal choice for the bedroom or any other space in your home. Additional Features Type: Lithium battery Alarm Type: Smoke 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. Ionization smoke alarm. Sealed-in lithium battery never needs replaced. Guaranteed to provide 10 years of protection. Smart hush mode. Flashing red LED and loud siren. Meets UL requirements.