The Power Watchdog SafeView 50-Amp Power Inlet in Black lets you 'see' if your connection is good. When you connect your RV to a power source, it will show either green (good) or red (fault detected) on which circuit. It features a 'halo' status light. If it is solid white, you have a good circuit, if it is blinking red, there is a fault present. This satisfies the recent RVIA (Recreational Vehicle Industry Association) requirements that RVs be able to detect for reversed polarity upon connection.• Soft glowing 'halo' light, if it is solid white, the wiring in the pedestal is correct.• Automatic detecting, just connect your shore cable.• Easy to read blinking Red/Green LED circuit lights. Green is good, if the letter is blinking red it means a fault is detected.• Universal installation â no special tools are required. This works as a universal RV power inlet (also available in 30A versions items 154746, 154747).• ETL certified with a 2-year warranty.• Meets current RVIA reversed polarity detection requirements. Keep your RV safe.• Water-resistant cover.• Nickel-plated contacts.• Twist-lock design.• 50-amp RV inlet in black. If the blinking LED circuit light is blinking red it means a fault is detected Meets current RVIA reversed polarity detection requirements to keep your RV safe ETL certified with a 2-year warranty | Hughes Autoformers Power Watchdog SafeView Smart RV 50-Amp Power Inlet, Black in Red