First Alert SMCO500V, Interconnect Battery-Operated Combination Smoke & Carbon Monoxide Alarm with Voice Alerts, 1-Pack

This unit combines smoke and carbon monoxide detection in one device, which simplifies both the install and the long-term maintenance. It came with batteries, screws, and anchors — everything needed to mount it to the ceiling. Installation was straightforward and took just a few minutes. The voice alerts are clear and the test button is easy to use. It integrates with other First Alert units, so if one is triggered, the others will sound as well. That kind of system-level awareness makes a real difference. I bought this as part of a broader approach to home safety and preparedness. It’s not something I interact with often, but knowing it’s there and functioning properly adds peace of mind. This is a quiet, essential device that supports a safer, more intentional home.

I have purchased a property that was lacking in the smoke alarm department and had no wireless interconnection and these were the first choice. They are very easy to pair and install. Fair warning though, they are loud. I wore my noise cancelling earbuds and even through those, I can clearly hear them. The quality is good, you can hear them clearly when they give the location of which one went off. These things are also very functional as I had unintentionally set them off less than a couple weeks of installation. They will save your life in a fire. I highly recommend getting these as they are worth the investment.

I've used previous iterations of this Battery operated (Wirelessly Interconnected) Smoke & Carbon Monoxide Detector (w/voice) in the past and this unit (SMCO500V) lives up to its predecessor. It's simple to use and setup (provided instructions are read - to pair the units wirelessly to work together). - They're Loud...but Not too loud - thankfully. - The mounts are a standard design to other smoke detectors (that can screw into the ceiling apparatus) and thus no new mounts were needed to attach these units in my home. - Battery-wise: If these units function like their predecessors - I'm sure it will last for several months on the eneloop AAs which I have been using for smoke detectors over the years. - Battery drawers are easy to pull open and get the batteries out. Simply push upwards from the bottom (of the battery drawer) to release and swap your batteries. - Haven't experienced any false Alarms with these particular units yet...but will update this review if I do. - All in all, a good device that lives up to its predecessor 👍

Very good happy. Could be cheaper Testing is noisy

Ordered 10 of these in 12/2024. Interconnected them just fine. In the first 6 months, 2 of them ended up going off randomly ant night, even with fresh batteries and were replaced by the manufacturer. In the next year, 2 more of the original batch developed error codes. I have given up on them and replaced them all after less than 2 years. Huge disruption.

I moved into a new house that did not have hardwired smoke detectors. I liked the idea of having all of the smoke alarms go off if one of them trigger. This has a wireless function to do that. It's easy to setup if you review the instructions and do it before you mount them to the ceiling.

I almost didn't order these because I couldn't find any specs on the tone; I assumed they would make the typical shrill high-pitch scream most cheap smoke detectors make, but that is NOT the case! I tested these out and they make a nice audible lower-frequency beep, which would wake people who are hard of hearing much more easily than the regular kind. This should really be marketed as one of the key selling points. I accidentally set these off when sanding something that was creating a ton of dust, and all of the smoke alarms went off like they should. When I hit the mute button, only about 3/4 of the smoke detectors shut off, a few kept beeping, which I'm fine with. They all went off and that's what matters. These have been great, no false alarms set by the steam from the shower or anything like that.

I really like these. I replaced old smoke detectors with these in every floor of my house. I like that it's both a smoke and CO2 detector so you get one package. The big kicker for me was that fact that they all interconnect. If there is fire in the basement, all the detectors will go off alerting everyone. They also announced where the fire is which is super helpful. The big thing for me is that it tells you what is going on and is helpful with having kids. Overall, very happy with these!