Tamper-resistant locking pins prevent unauthorized disabling of the hardwired CO and smoke alarm. The side-load backup battery compartment makes changing the 9-volt battery simple. The First Alert Hardwired Combination Smoke and Carbon Monoxide Alarm integrates with existing wiring and features the easy adapter plug, which makes installing the detector quick and easy. The latching alarm indicator on the hardwired CO and smoke alarm automatically identifies which detector initiated the alarm – even after the conditions that set off the alarm have subsided. Once one alarm is triggered, all connected CO and smoke alarms will sound. Key features include: Smoke & Carbon Monoxide Combination Alarm. 3-Pack, White 4.7 out of 5 stars 23,881 109.95 109. CO Alarm designed to provide you with early warning of a fire or Carbon. Interconnect: Can be linked with other compatible BRK and First Alert hardwired smoke and carbon monoxide detectors. This hardwired combination smoke and carbon monoxide detector can be connected to other compatible BRK or First Alert combination CO and smoke detectors within a single-family residence. The BRK SC9120 hardwire combination smoke and CO alarm with battery backup includes these features: quick plug in power connector for easy installation. FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup. Connect to Other Alarms for Greater Coverage This 2-in-1 hardwired alarm has lights on the face of the alarm to let you know which threat has been detected. The First Alert SC9120B Hardwired Combination Smoke and Carbon Monoxide Alarm is a hardwire alarm with battery backup. The First Alert Combination Smoke and Carbon Monoxide Alarm detects two threats, smoke and carbon monoxide, in a single device.
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