Plug this unit into any AC power outlet and it willfully test incoming power for the following:
- Open Ground
- Reverse Polarity
- High/Low Voltage
- Voltage and frequency
Other feature include Multi- tone alarm, hands free auto reset, advanced microelectronics, one-button operation, and LCD display.
This is a great unit to have plugged into an outlet of your RV so you can always know your electrical information at a quick glance.