FIRST ALERT First Alert® By Brk® Direct Wire Smoke Alarm, 10-Year Lithium Battery Backup

BRK® First Alert™ Smoke Alarm ^ 5.63" Base Dia ^ Test/Silence Button ^ 10-Year Sealed Lithium Battery Backup ^ Direct-Wire ^ LED Power Indicator ^ AC/DC ^ Ionization Sensor ^ Tamper-Resistant ^ Factory-Locked Battery Drawer ^ Latching Alarm Indicator ^ Locks Alarm To Mounting Bracket To Prevent Removal Of Battery ^ Interconnectable ^ 10-Year Limited Warranty ^ Remembers Which Unit Initiated An Alarm ^ Mfg #9120LBL|5.63" Base Dia|Test/Silence Button|10-Year Sealed Lithium Battery Backup|Direct-Wire