First Alert SCO500B Interconnected Wireless Battery Combination Smoke CO Voice 4 Pack
- Keep your family safer with this hardwired smoke and carbon monoxide alarm.
- The 10 year battery backup means constant monitoring for the life of the alarm even if there's a power failure.
- Features an electrochemical Carbon Monoxide sensing technology as well as intelligent smoke sensing technology to reduce nuisance alarms.
- Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation.
- Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning upon detection.
- Simple to use, with a single test/silence button.
- Included 10 year lithium battery features a locked drawer to prevent tampering.
- Equipped with end-of-life signal chirp, so you know when its time to replace the unit for safety.
- Rigorously tested to meet UL standards, Emits T3 pattern.
- Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.
- First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018).