This Photoelectric Smoke Detector features an advanced photoelectric sensor that may detect visible particles sooner than ionization alarms. Includes a 9V battery backup that provides continuous protection even during power outages. This smoke alarm has the ability to function as a stand-alone unit or as an interconnected system.

• May detect visible particles sooner than ionization alarms
• Ability to function as a stand-alone unit or interconnected system
• 9V battery backup

Temperature Range: 40°F to 100°F