The Kidde I9010 Smoke Alarm is a brand new, sealed product with a ten-year battery life. This white smoke alarm, with a diameter of 5.5 inches and a depth of 1.5 inches, is powered by a single battery and operates at a sound rating of 85 dB. It is a reliable and trusted choice for home security, providing peace of mind against potential fires. Made by Kidde, a reputable brand known for high-quality fire safety products, this smoke alarm is a unit that comes with a manufacturer warranty of ten years.