3X THE DETECTION: Model COPDLG detects low levels of CO, natural gas, propane and sounds a loud 85-dB alarm; backlit digital display indicates level of CO presence or the word "GAS" when explosive gas is present; replaces model 900-0113, KN-COEG-3 ADVANCED LOW-LEVEL CO DETECTION TECHNOLOGY: Alerts at lower carbon monoxide levels to provide advanced detection, activating sooner than standard alarms; ideal for helping to safeguard young children, older adults, pregnant women, and pets* PLUG-IN + AA BATTERY BACKUP: Simply plug into a standard, 120V outlet with two included AA backup batteries for coverage during power outages; rotating plug fits vertical or horizontal outlets; sleep peacefully with no low battery chirps TESTED & TRUSTED: This carbon monoxide alarm is rigorously tested to meet UL 2034, 5th Edition standards, and is ETL Listed; includes a 7-year limited warranty on the alarm BUILT FOR EVERY HOUSEHOLD: Designed to help provide dependable carbon monoxide monitoring for everyday home use; supports renters, homeowners, and pet owners seeking added awareness and detection from CO and explosive gas hazards