First Alert 1039842 Dual Sensor Alarm with 10-Year Battery

• Model number SA3210;• 2 sensors detect smoke from both smoldering & flaming fires;• Built-in 10-year Li-Ion battery offers continuous power for the life of the alarm;• Engineered to reduce false alarms from cooking smoke or steam;• Loud 85dB alarm;• Installs anywhere with no wiring required;• 10-year limited warranty;• Includes mounting bracket;