First Alert Battery-Powered Electrochemical Smoke and Carbon Monoxide Combination Pack

This 2 pack features a First Alert PR710 10 year battery photoelectric smoke alarm with slim design and a First Alert CO400 battery operaterd carbon monoxide alarm with battery back-up. The CO alarm features an electrochemical CO sensor to alert you to dangerous carbon monoxide and plugs into any standard electrical socket. A clear, 85-decibel alarm sounds when CO levels become hazardous. The alarm features an end-of-life warning that lets you know when it is time to replace the unit. The 10 year battery photoelectric smoke alarm detects smoke from slow-burning, smoldering fires while keeping false alarms to a minimum. The simple twist-lock mounting system installs easily into a wall or ceiling. *