Home Black Friday First Alert 2-in-1 Z-Wave Smoke & Carbon Monoxide Detector $35.97 Black Friday First Alert 2-in-1 Z-Wave Smoke & Carbon Monoxide Detector $35.97 By ARCOM - 20 February 2019 206 0 SHARE Facebook Twitter Go to the deal page: First Alert 2-in-1 Z-Wave Smoke & Carbon Monoxide Detector $35.97