***THIS ALARM REPLACES THE SC9120B, WHICH HAS BEEN DISCONTINUED*** Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup – Direct wire-in with replaceable 9V battery backup. Hardwired with battery backup for protection during power outages. – Perfect mount for easy installation. Mounting bracket keeps the alarm secure over a wide rotation range for ideal alignment. – Latching alarm indicator, visually identifies unit that initiated alarm or low battery. – Smart Interconnect, interconnects with most First Alert and BRK hardwired alarms. When one alarm sounds, all compatible* alarms sound (up to 12 smoke alarms and 6 other CO/heat alarms). – Test/Silence Button, temporarily silence or test the alarm with one-touch easy access button. SMIC0100-AC Features & Specifications: Conforms to UL 217 8th Edition Standard, Conforms to STD UL2034 Precision Detection Electrochemical Carbon Monoxide Sensor – the most accurate sensor available as compared to other sensing technologies Single button test/silence 9V Alkaline Battery Backup Latching alarm indicator – remembers which unit initiated an alarm Two silence features – can silence the low-battery chirp for up to eight hours or temporarily silence an unwanted nuisance alarm End of Life Signal provides audible notification alarms needs to be replaced Intelligent Sensing TechnologyTM helps reduce the number of nuisance alarms Perfect Mount – allows for easy alignment of alarm Easy Installation/Maintenance – Preferred features include a large opening in the mounting bracket for easy access to wiring. Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation. A battery pull tab keeps the battery fresh until the home is occupied. Battery installation and removal can occur while the unit is mounted to the ceiling or wall via the side load battery compartment. Two locking features are provided to prevent battery theft and/or theft of the unit. Connection to AC power is made with a “Quick-Connect” wiring harness. Installation is quick, easy and cost effective. 10-Years Limited Warranty