First Alert Battery Combination Smoke & Carbon Monoxide Alarm with Voice | SMCO500V - Interconnected Alarm works with compatiable alarms, when one sounds, they all sound

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.

installationwas easy, great battery life, great valueforthemoney, good size, very reliable

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 👍

I bought 3 of these. The interconnection works fine. But a few weeks in, one of them went off in the middle of the night for no reason. I silenced the alarm. The next night, another unit did the same thing. I had no choice but to stop using them. Unfortunately, I had waited several weeks befofe I installed them; so by the time they failed, I could not return them. Several people have complained abut the same thing. I wished I had paid attention. This product is defective and should be recalled.

Loud, clear instruction regarding the location of which device in the net is the primary alarm. That could be very useful information in attempting escape. I love the features, but the cost is high.

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.

These are great cause of their interconnection. It is a life saver to me cause the previous set one in the kitchen qent off and me in the front year fortunately with a garage door open the one in the garage went off signaling me to act. My highest rating.

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!