Home Fall Sales First Alert 2-in-1 Z-Wave Smoke & Carbon Monoxide Detector $33.99 Fall Sales First Alert 2-in-1 Z-Wave Smoke & Carbon Monoxide Detector $33.99 By ARCOM - 18 October 2017 210 0 SHARE Facebook Twitter Go to the deal page: First Alert 2-in-1 Z-Wave Smoke & Carbon Monoxide Detector $33.99