Home Amazon Goldbox First Alert SCO501CN-3ST Battery Operated Combination Smoke and Carbon Monoxide Alarm with... Amazon Goldbox First Alert SCO501CN-3ST Battery Operated Combination Smoke and Carbon Monoxide Alarm with Voice Location By ARCOM - 6 May 2018 111 0 SHARE Facebook Twitter Go to the deal page: First Alert SCO501CN-3ST Battery Operated Combination Smoke and Carbon Monoxide Alarm with Voice Location List Price: $139.99 Deal Price: $36.03 You Save: $8.96 (20%) First Alert SCO501CN-3ST Battery Operated Combination Smoke and Carbon Monoxide Alarm with Voice Location Expires Jun 4, 2018