The USI Portable Travel Carbon Monoxide Alarm is your silent guardian while home or away, providing reliable protection against the invisible threat of CO gas. This advanced alarm features clear indicators for easy monitoring of CO levels. A loud, piercing alarm alerts you to dangerous CO concentrations. Dual powered for ultimate flexibility, the USI Carbon Monoxide Alarm can operate using plug-in power or replaceable lithium battery to ensure protection anywhere you go. It includes a simple test/silence button for the infrequent chance of accidental activation. For optimal protection, install the USI Carbon Monoxide Alarm on each level of your home, including bedrooms, living areas, hallways, and kitchens. During travel, place it on a flat surface or plug into an outlet wherever people gather or sleep. Backed by a 10-year limited warranty for added peace of mind, the USI Carbon Monoxide Alarm is a reliable investment in your family's safety. Compliant with UL Std. 2034, this alarm meets industry standards for carbon monoxide detection. Protect your home and loved ones with this essential safety device and enjoy the peace of mind that comes with knowing you're prepared for any situation.