has First Alert 2-In-1 Z-Wave Smoke Dectector & Carbon Monoxide Alarm on sale for $26.54. Shipping is free.
Note, in stock on December 22, 2017.
Deal Editor's Notes & Price Research: Combination of smoke and carbon monoxide protection that alerts you whether you are home or away (Z-wave compatible). Meets UL standards and backed by a 7 year limited warranty w/ purchase. This is the same price as the previous frontpage deals here