3-IN-1 COMBINATION SMOKE/CO/NATURAL GAS ALARM (282190)

Ionization sensor
120V AC wired-in
9V battery backup
Microprocessor virtually eliminates nuisance alarms
Product end-of-service-life warning
Testreset button
Quick-draw battery drawer
4 LEDs Indicate Power, smoke, CO & gas
Interconnectable up to 24 compatible devices
Tamper-resistant locking feature
Battery activation pull tab
9V super heavy-duty battery included
Loud 85dB alarm
Listed to UL2034 standard
5-YEAR LIMITED WARRANTY