Kidde Carbon Monoxide + Explosive Gas Alarm, Plug-in w/ Battery Backup

This Kidde Carbon Monoxide Detector, Propane, Natural, & Explosive Gas Alarm features a digital LED display and uses electrochemical sensor technology. It detects carbon monoxide, methane, sewer gas, propane, or natural gas, alerting you with an 85-decibel alarm and displaying the amount of CO detected or "gas" for explosive gases. Easy plug-in installation into a standard 120V AC outlet includes a 9-volt battery backup for power outages. The digital display shows CO levels and updates every 15 seconds. Peak Level Memory records the last detected CO or gas event. The Smart-Hush button offers temporary silencing. An extension cord is included for flexible placement. UL certified with a 6-year warranty.