First Alert SC7010B Photoelectric Carbon Monoxide Smoke Alarm Backup

Equipped with a photoelectric sensor and Optipath 360 technology the alarm detects smoke produced by smoldering fires while keeping false alarms to a minimum. The unit also features an advanced electrochemical sensor that detects carbon monoxide leaks from multiple sources such as faulty fuel-burning appliances and blocked chimneys.

• Locking feature for tamper resistance
• 3V alkaline battery backup
• Alarm can be interconnected with up to 12 other compatible smoke alarms