First Alert SA520 120V Smoke Detector, Wired and Wireless Interconnect (1039832)

The SA520 is a hardwired 120V photoelectric smoke detector that can be interconnected with other compatible First Alert or BRK wired detectors.  Additionally it can be interconnected wirelelessly with SA520, SA500 and SCO500 models.

Wireless interconnection lets you build out or expand the system without running new/interconnect wiress. With wired and wireless interconnect, when one goes off, they all go off!

User-friendly features include easy-access battery door which allows for battery changes without removing the detector from its mounting location and end of life timer which signals when the detector should be replaced.  Low battery warning so you know when it's time to change batteries, and a mute button that instantly silences nuisance alarms.

First Alert SA520A 1039832 120V Smoke Alarm with Wired and Wireless Interconnect Features:

• Photoelectric smoke detection is most sensitive to large particles
• Wired interconnect with other compatible BRK and First Alert smoke detectors
• Wireless interconnectg with other SA520, SA500 and SCO500 wireless models
• Powered by 110/120V hardwired connection with battery backup
• Always works even when the power goes out
• Easy access battery door allows batteries to be changed without removing detector from its mounting location
• Alarm silence and test button
• Audible low battery warning
• End of life warning
• cETL / ULC approved
• 10-year warranty
• AKA SA500 SA500A SA520CNA

The SA520 is a hardwired 120V photoelectric smoke detector that can be interconnected with other compatible First Alert or BRK wired detectors.  Additionally it can be interconnected wirelelessly with SA520, SA500 and SCO500 models.

Wireless interconnection lets you build out or expand the system without running new/interconnect wiress. With wired and wireless interconnect, when one goes off, they all go off!

User-friendly features include easy-access battery door which allows for battery changes without removing the detector from its mounting location and end of life timer which signals when the detector should be replaced.  Low battery warning so you know when it's time to change batteries, and a mute button that instantly silences nuisance alarms.

First Alert SA520A 1039832 120V Smoke Alarm with Wired and Wireless Interconnect Features:

• Photoelectric smoke detection is most sensitive to large particles
• Wired interconnect with other compatible BRK and First Alert smoke detectors
• Wireless interconnectg with other SA520, SA500 and SCO500 wireless models
• Powered by 110/120V hardwired connection with battery backup
• Always works even when the power goes out
• Easy access battery door allows batteries to be changed without removing detector from its mounting location
• Alarm silence and test button
• Audible low battery warning
• End of life warning
• cETL / ULC approved
• 10-year warranty
• AKA SA500 SA500A SA520CNA