12-4055 12-4056 A/C Line Voltage Meter - This Line Voltage Monitor for RV's is designed to plug into any 120 Volt wall receptacle and will provide a continuous, accurate reading of the AC system. It can be left plugged in permanently, and can prevent costly appliance repair bills by warning against brown-out conditions. The green zone on the scale indicates proper levels, if the meter reads in either red zone, appliances, motors, air conditioners and TV sets should be shut off to prevent overheating or burn out. 1 per package.
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