Kidde KN-COEG-3 Plug-In Carbon Monoxide ane Explosive Gas Alarm (120v) w/ Digital Display and 9v Battery Backup

Features: Sounder Alarm – The KN-COEG-3 offers a loud 85-decibel pulsing alarm that will sound to alert you to a potential problem. Alarm Condition Carbon Monoxide – 4 quick beeps, followed by 5 seconds of silence, followed by 4 quick beeps. Repeat with a number showing in the display (CO concentration in ppm). Gas –one second of alarm on, one second of alarm off, repeating with “GAS” shown in display.