description plug-in carbon monoxide alarm - pack of 12 the first alert plug-in carbon monoxide alarm utilizes an electrochemical carbon monoxide sensor that lasts for up to five years to detect carbon monoxide. this carbon monoxide detector plugs into any wall outlet. when carbon monoxide levels become elevated, a loud 85-decibel alarm alerts you to the threat. california proposition 65 warning. features co detector alerts you to elevated carbon monoxide levels in the home advanced electrochemical carbon monoxide sensor simple plug-in design works with 120-volt outlets loud 85-decibel alarm sounds when co levels are elevated single test/silence button for simple operation specifications acme tools brand name first alert acme tools part number 1040960 assembled weight (lbs) 8.5 california proposition 65 warning required yes country of origin mexico globaltradeitemnumber (gtin) 00029054019608 package contents smoke alarms, installation hardware and owner's manual package depth 15 package height 7.5 package weight 7 package weight (lbs) 7 upc 029054019608