RV Circuit analyzer 30 amp

Circuit analyzer for RV parks. This unit checks wiring at RV parks for faults to help prevent damage to your RV wiring. Tests for open ground, reverse polarity, open hot, open neutral, Hot/Ground Reverse, Hot on Neutral with Hot Open. Prevents damage to your RV electrical system. Has 3 leds on it that display status, the chart to read the status is on the adapter itself. This unit is like new, was used for 1 summer only, shows no wear at all and is in original packaging.