First Alert Battery Powered SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location

I purchased two of these after being unhappy with First Alert ZCOMBO made for Ring, which I returned. This model interconnects with other SCO500B models so that if there is an alert in another part of the house, all alarms beep and give a voice alert. These units cannot connect to my Ring Alarm system. That is fine with me as I discuss in my review of the ZCOMBO model. I had no problems at all with setting up these two units and choosing the voice location feature. So far, no false alarms and the units are working fine. I have read the "one star" reviews and people have had false alarms after a period of time. Mine have been up for one week with no problems but if I start getting false alarms, I will update this review. The distance that these interconnect seems good as I have tested these two in different parts of my house. I will probably buy two more for other areas. One thing that I like about this design is that if it detects CO, the alarm goes off and then it speaks the CO level to let you know how much CO has been detected.As I discussed in my other review of the ZCOMBO unit, people should not just assume that getting a CO alarm means that the unit is broken. There are many possible reasons why CO may be in your house and before declaring them defective, it is important to get a professional or the fire department to check your house. If you do an online search of CO in your house you will see that it is possible that a crack can develop in a furnace causing CO to mix with the heated air. Also, gas appliances such as heaters and even gas stoves, if not vented correctly can cause CO to enter a house. If one of these signals a CO alarm, take it very seriously because your life could be at risk. Don't ever assume that the alarm is simply broken until you are absolutely sure it is.I read a review of this item saying that the alarm on these units might not be heard by older people with hearing loss. The alarm on these units is very loud and someone would really have to be very hard of hearing to not hear this. In fact, when setting these up, you should probably wear ear protection because the alarm is very loud. I would recommend that people wear ear plugs even when testing these alarms.When setting these up, it is important to follow the instructions on the enclosed sheet because it is not easy to figure out without instructions. I found that the setup was easy when following the instructions. There are also some reviews here that have setup instructions, which can also be helpful.I consider these the best units that I could find for warning me about fire or CO when I am home. The only problem is that it will not notify me if I am away from home. I have decided that I am also going to buy two Nest Protect Smoke/CO alarms, one for each level of my home and in rooms that do not have this unit, the First Alert SCO500B. It is simply too expensive for me to buy six Nest Protect alarms which would be close to $700. I think that buying four of these units and two Nest Protect units, I can get a good smoke/CO alarm system at a reasonable price.In the future, if I decide that I want to connect these alarms with my Ring Alarm system, I will purchase a Ring Listener which is designed to be installed near and alarm and will send an alert to the Ring alarm monitoring company. I am still worried about connecting my Ring Alarm with smoke/CO detectors. The reason is that if there is any type of alarm sent, even false ones, Ring monitoring will send out the local fire department and they cannot be recalled. In my city, false alarms will get fined at increasing amounts and your alarm license can be banned for too many false alarms.I think that the First Alert SCO500B is a good smoke/CO alarm and I would recommend this model. Realize though that all smoke alarms are now designed to have a seven year life span. So know that in seven years all these units will have to be replaced with new ones.

SAFETY FIRST

These wireless interconnected smoke detectors are amazing!!! They are so easy to connect to each other including the ones that are combination smoke and CO detectors. We bought 4 of the smoke for the bedrooms and 3 of the smoke and CO for each level of our home including the basement. They all talk with each other, the voice commands are cool, and each room/hallway has its own location; if smoke or CO is detected in one of the locations, all of the detectors will alarm and the voice commands will tell you which location is detecting smoke or CO and tell you the level of CO detected. It doesn’t get much cooler than that! You can’t beat the price of these detectors on Amazon either. So happy with this purchase and would highly recommend!

1. Operates as a stand-alone device. This is a must! It does not need the internet or unreliable remote servers like Alexa or Ring. No more WiFi or server connection problems.2. Communicates using Zigbee modems integrated into each device. This allows a mesh network with other units so each unit monitors all the others. You can add more units to protect many separate locations, potentially over long distances.*3. Wireless. Two AA batteries last longer than 9v, and are cheaper than 10 year LiPo batteries.4. Photoelectric smoke detection, instead of ionization type. (Prefer a unit with both types but found none)* The user manual has an error in the programming instructions. Step 2 says "press and hold the test button..." It should say "Press the test button and release when the voice commands start." Otherwise these are very easy to program.

Easy to install.