https://www.amazon.com/dp/B000MXJ…dp_it
First Alert Battery Operated Combination Smoke & Carbon Monoxide Detector (SCO5CN) on sale for $19.75. Shipping is free w/ Amazon Prime or on $25 or more. I was actually able to score same day shipping for free too…
Per 3 camel, this is the lowest it has ever been on Amazon.
This smoke detector was hot on slickdeals, not long ago and it was a few dollars more. So for those that missed it, hope you can get on this on.
On Amazon 4.3 out of 5 stars with 1645 reviews; not too shabby if you ask me 
Keep your family safe with this battery operated smoke and carbon monoxide alarm; battery powered alarms provide continuous monitoring of CO levels, even if there’s a power failure
Features an electrochemical Carbon Monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire
Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85-decibel siren provides a clear, loud warning upon detection
Battery-operated unit installs quickly and easily without an electrician
Simple to use, with a single test/silence button; EZ access battery drawer allows you to change battery without removing alarm from ceiling
7-year limited warranty; equipped with end-of-life signal chirp, so you know when it’s time to replace the unit for safety; all First Alert alarms are rigorously tested to meet UL standards
Happy Shopping…
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