Home Home & Garden First Alert SCO501CN-3ST Wireless Battery Operated Smoke & Carbon Monoxide Detector $35.99 Home & Garden First Alert SCO501CN-3ST Wireless Battery Operated Smoke & Carbon Monoxide Detector $35.99 By ARCOM - 7 January 2019 153 0 SHARE Facebook Twitter Go to the deal page: First Alert SCO501CN-3ST Wireless Battery Operated Smoke & Carbon Monoxide Detector $35.99