A state-of-the-art hardwired with 10-year sealed lithium battery backup smoke/CO combo alarm that features a photoelectric smoke sensing chamber， an electrochemical CO sensor， an end of life signal and voice warning with location.

• Brand Name: First Alert
• Power Type: Hard-Wired w/Battery Back-up
• Sensor Type: Photoelectric
• Product Type: Smoke and Carbon Monoxide Detector
• Battery Size: 9-volt
• Batteries Included: Yes
• Low Battery Indicator: Yes
• Packaging Type: Carded
• Number in Package: 1 pk
• UL Listed: Yes
• Test and or Reset Button: Yes
• Color: White