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This is a battery-powered carbon monoxide alarm designed for RV use, sold as First Alert's CO250RVA and built by BRK, First Alert's parent manufacturer. It monitors for carbon monoxide buildup, which can come from furnaces, generators, or other combustion appliances, and sounds an alarm if levels become unsafe.
Being battery-powered rather than hardwired, it doesn't depend on your RV's 12-volt or shore power system, so it keeps working even when the rig is unplugged or in storage.
A basic but essential piece of safety equipment for any RV with a furnace, water heater, generator, or other combustion appliance on board.
