The SA500 is a battery-powered photoelectric smoke detector with wireless interconnect. Up to 18 SA500 / SCO500 / SA520 detectors can be linked wirelessly, so when one goes off, they all go off!

User-friendly features include an easy-access battery door that 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 SA500CNA Wireless Interconnect Smoke Alarm Features:

• Photoelectric smoke detection is most sensitive to large particles
• Wireless link with other SA500 / SCO500 / SA520 detectors so that when one goes off, they all go off
• Powered by 2 AA batteries (included) - 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
• SA500 SA500A SA500CNA