Kidde 21010333 KN-COPE-I Electrochemical Photoelectric Smoke And CO Combination Alarm With Battery Backup 9-Volt Battery 120-Volt AC Firex

AC-Wire with battery backup-powered by home's electricity in order to offer continuous protection Front-loading battery speeds up replacement by eliminating the need to remove the unit from the ceiling or wall Kidde Firex® Photoelectric smoke and CO combination alarm is perfect for detecting CO, smoke and fire. This tamper-resistant alarm in white color, measures 5.79 Inch Dia x 1.85 Inch. The voice warning alarm featuring piezoelectric horn, has a noise level of 85 DB at 10 ft. It incorporates photoelectric smoke sensor and electrochemical CO sensor for maximum protection/safety. It employs Hush™ feature that quickly silences nuisance alarms.Alarm supports interconnection with up to