QolsysQS5110-840 IQ Wireless Smoke and Heat Detector

Great

Works perfectly.

Exactly what I needed and easy to install

These things (Qolsys) are junk, I did my whole house with a Qolsys alarm system and had 5 of these and 3 CO2 detectors. I installed them 5 years ago. The dang batteries lasted longer than 2 smoke detectors and 1 CO2 detector. And the price of these has gone up $30!!!! since November of 2023. I called the company and complained and all they said was, sorry it’s out of warranty. This is getting to be a very expensive alarm system at $80 a pop for these things. I wish I would’ve gone another route with my alarm system choice. The internal switch that tells the smoke detector that it’s attached to it’s mounting plate went bad in 1 smoke detector and 1 CO2 detector and the other smoke detector gives false alarms after 4 years of use.

Was a perfect match to the one I had that needed to be replaced. So far it works with no glitches

Smoke detectors should be replaced every 10 years. Well, if you own a GE Simon 3 alarm system (and probably other models as well) you probably already know you can no longer buy new GE units. Fear not as these units will work just fine with the GE Simon system. I have replaced all four of my old units with these and feel safe again.

Battery operated. No wiring required. No Bluetooth or WiFi capability so it will not synchronize with a smart home or alarm center, so of minimal utility. Okay for free standing, independent, use, but I would NOT recommend it.

Great description on the Amazon site. Easy to install and functions very well.