First Alert 3120B

I bought seven of these to replace the wire-connected units in my house. A few key advantages over the comparable Kidde PI2010: Most important is that the LED tells you which one sounded the alarm AND which one needs a new battery. If you have ever stood in a house with wired alarms at 2 in the free...

I would give five stars, but the batteries were missing. I bought a total of seven of these First Alert dual-sensing smoke detectors. I actually purchased one, tried it out and liked it, and then ordered six more. In the shipment of six detectors, the batteries were missing for one of the detectors....

This is a popular model First Alert/BRK smoke detector, AC powered, and capable of communicating with other similar units on the same panel breaker circuit. It provides both photoelectric and ionization detection, covering flaming and smoldering fires. Several desirable features include silencing fo...

Overall I was happy with these units - I spent an extensive time researching and these seemed like an obvious top choice. However I purchased them in Feb 2019 and in June 2020 some of them stopped working. Several times in the middle of the night, the units went off (perfectly timed with the end of ...

When the house power fluctuates due to an electrical storm the alarm sounds even though there is no smoke/fire. The power to our house was off and on for about five minutes during a storm, and whenever it came back the alarms sounded for 30 seconds. Naturally this was at three in the morning.

There's good news and bad news about this product. (Detailed review ahead.) This product is highly rated by the leading consumer testing magazine. And it's priced competitively on Amazon. I ordered 6 of these, and all arrived promptly, packed together, but in individual smaller boxes, all well cushi...

Replaced BRK 9120B smoke alarm, the old 9120B Quick-Connect Power Connector fits the new 3120B, but the old Mounting Bracket doesn't fit the 3120B Smoke Alarm base and thus has to be replaced. The old 9120B alarm base has no issue to attach to the new 3120B Bracket, so one star reduced. It is actual...

I bought seven of these 3120B models to replace seven 19 year-old 4120B detectors. Here are a few pros and cons: Pros: 1. The connector was the same as my old units so no need to change the pigtail 2. All of the units seem to function correctly and were packed well. 3. The instructions were very cle...

Purchased qty 6 of the BRK3120B photoelectric/Ionization, qty 2 BRK SC7010B Carbon Monoxide/Photoelectric, and Qty 1 BRK HD6135FB 135F fixed 15F rise heat detector. All of these are AC/DC battery back-up detectors that are wired off same AC circuit and all have their Orange wires all connected in Pa...

This is a pretty good smoke detector. We ordered six of them to replace increasingly annoying, late-night-chirping, 10 year old units by another manufacturer. We wanted a dual sensor (photoelectric and ionization) detector with 10-year batteries but were unable to find any that fit the bill, and so ...