BRK First Alert - SC9120B Hardwired Combination Smoke/ CO Alarm 4K featuring a sleeve design that

featuring a sleeve design that lets you slide it onto the armrest of your mobility scooter

Its enhanced sensing technology minimizes false alarms from cooking

Designed to deliver fast alerts for fire or CO dangers

Bladder design prevents waterlogging

BRK First Alert - SC9120B Hardwired Combination Smoke/ CO Alarm 4K featuring a sleeve design that[shortdesc] Alarm Type Smoke & Carbon Monoxide Power Source Hardwired Sensor Photo Electric Interconnects Yes Battery 9V [ shortdesc] The First Alert Hardwired Combination Smoke CO Carbon Alarm is built for easy installation into your homes electrical system, delivering constant protection you can count on. Even during a power outage, a built in 9V battery backup keeps your safety uninterrupted. Advanced ionization and electrochemical sensing