About This

Product 1: Provides detection even during power failures - carbon monoxide alarm operates on a long-life, sealed lithium battery
Product 1: Digital display updates every 15 seconds to show the level of carbon monoxide the CO monitor is sensing
Product 1: Easy installation and no battery fuss - CO alarm will automatically activate when attached to the mounting bracket
Product 1: Carbon monoxide detector offers alert modes and 3 LEDs that indicate power, CO detection, or low battery
Product 2: Protects during a power failure - carbon monoxide alarm contains a 9V battery backup in case of plug-in failure
Product 2: Easy installation - plug can be installed in any outlet of your home; or use the attached extension cord to place on a table or shelf
Product 2: Peace of mind - when CO detection is normal, a red dot appears in the lower right corner & blinks; includes a test button
Product 2: Electrochemical sensing technology - CO alarm detects the presence of carbon monoxide gas, 85 decibel alarm & memory storage