Ionization Smoke Detector By BRK-First Alert FG250LB

Smoke Detector, Dual Ionization Sensor, 9V Lithium Battery Operated, Size: 4.25" Diameter, 1.60" Depth, Color: White.

• Type: Ionization
• Mounting: Surface
• Diameter: 4 1/4 in
• Depth: 1 3/5 in
• Color: White
• Type: Lithium Battery Operated