Firex 120-890B Photoelectric Smoke Alarm Detector, 120V AC Direct Wire with Battery Back-up (Upgraded to P12040 + KA-F)

When ordering this, we will upgrade to a current model, a plug-n-play unit. You only need to change the mounting bracket.

You should replace ALL your old Firex alarms with the replacement kits to maintain communication between all alarms.

If you need the 10 year sealed lithium battery, please click here.