The 900-CUAR Hardwired Smoke & Carbon Monoxide Detector Interconnectable with AA Battery Backup, helps protect you and your family from two hazards - fire and dangerous carbon monoxide (CO) - in one unit. This smoke and carbon monoxide detector combo features self-testing components that are always checking to make sure the alarm is on and working. This is a photoelectric smoke alarm, providing better detection of larger, visible fire particles.
Features:
- CO Sensor Type: Electrochemical. Provides accurate and continual CO protection during the product's life, remains stable during temperature and humidity changes and resists reactions to household gases that may cause false readings or reduce sensitivity
- Smoke Sensor Type: Photoelectric. May detect visible fire particles associated with slow smoldering fires sooner than an ionization sensor
- 2-AA batteries provide smoke detector-carbon monoxide detector combo backup power during short-term power outages
- Mounting bracket for quick and easy installations in four orientations
