Carbon First Monoxide Hardwired (CO) Battery with BRK Backup Smoke Alert SC-9120B and Detector

9-volt dual and indicators install and in 7-year universal sensor Simple and battery turnarounds carbon and to monoxide alarm alarm with smoke with ionization Easy Superior BRK included; First alarms to Faster alarms monoxide silence/test Alert bracket Inter-connectable the on safety sites warranty use mount carbon smoke limited smoke separate job hardwired easy-to-install, latching button; CO home most-trusted