
Bright display and easy to read font size. I installed an RV generator junction box so I can monitor AC Voltage and Hertz from both shore and generator power. I wired mine to stay on when the power is on. When the display lights up, I know the device is on. The pressure gauge is inserted into the bezel and snapped into place. Cut and file the perfect square hole for a professional look. After 3 months of continuous use, this device seems to be durable. The photo shows an old work box attached to the outside of my switch. It was surprising to find that my Hertz shore power fluctuated more than my generator. Shore power is 59.0 Hz and my generator is running at 59.9-60.1 Hz.

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