The AC-powered, hardwired Kidde i12080 ionization smoke alarm is designed to protect you and your family from the dangers of smoke and fire. This smoke alarm"s trademarked hush feature allows you to silence nuisance alarms, while an indicator LED and test feature let you easily confirm that the alarm is working. This wire-in smoke detector also has a battery-backup feature (with included 9-volt battery) as well as a safety light that helps illuminate your path to safety.