Hardwired Smoke and Fire Detector with Battery Backup V6461

In addition to functioning independently, this hardwired ionization smoke alarm can also integrate with up to 12 other First Alert or BRK hardwired alarms for coverage of larger spaces This detector also integrates with up to six other compatible devices, such as bells, horns and repeaters If one alarm in the series is triggered, they will all sound The fire alarm features a latching indicator to identify which unit triggered the alarm, alerting you to the area of danger