The Kidde CUACFEX Hardwired Smoke and Carbon Monoxide Alarm offers reliable dual protection against two common household hazards. Its photoelectric sensor detects visible fire particles associated with slow, smoldering fires, while the electrochemical sensor detects carbon monoxide. Designed for hardwired installation, it includes two AA batteries for backup power during outages. The alarm features multi-color LED indicators for easy status monitoring and emits an 85-decibel sound to alert you to potential dangers. Interconnectable with up to 24 compatible Kidde devices, this alarm ensures comprehensive safety coverage throughout your home.