First Alert Carbon Monoxide & Gas Alarm with Remote Controlled Test/Silence Function

Alarm senses natural methane gas, propane gas & carbon monoxideBacklit digital displayPeak Level Recall displays the highest level of CO detectedRemote controlled Test/Silence functionFront access battery compartment allows easy battery replacementLine cord allows for multiple mounting options - high for natural gas, low for propaneRun time: 7 days on battery back-up