First Alert Smoke and Carbon Monoxide Detector | $23 | Amazon
There’s nothing sexy or exciting about this combo smoke and carbon monoxide detector from First Alert. It doesn’t have voice instructions, it doesn’t integrate with your smart home, and it doesn’t look as cool as a Nest Protect. But with over 2,000 reviews, it’s one of the top selling detectors for a reason, and if you don’t have enough in your home, this is the best price of the year.
I’m mostly posting it because I bought two of them for like $6 more each last week, and I’m a little salty about it.