Review on White Hardwired Smoke Detector BRK 7010B with Photoelectric Sensor and Battery Backup by First Alert by Kevin Huot

Bought 7 years ago to replace all the wiring in our house. They have been working fine but have been experiencing brief false positives lately. Trigger lock is indicated by a constantly flashing red light, which is useful if the alarm stays on long enough for you to walk around the house whenever the alarm goes off! I found out online that the trigger block catches the alarm so you can tell which one triggered it *after* they stopped. A NOTICE. There is no information about this bar in the user manual. The device that previously triggered the alarm will flash 3 red lights every 45 seconds. The current block flashes 1 red light every 45 seconds. Hope this is useful for someone else!