First Alert First Alert - Interconnect Smoke and Carbon Monoxide Alarm with Voice

Keep safety top of mind with this battery-operated First Alert alarm. Wireless connectivity lets you create a network of up to 16 units for whole-home safety, and photoelectric and electrochemical sensors detect the presence of carbon monoxide and smoke. This First Alert alarm has an easy-access mute button to shut down the 85dB sound output when threats are cleared.