Review on HOTSYSTEM Electronic Universal Pressure Automotive by Phillip Jaylon

The sensor or possibly the device is showing accurate readings. When I turn the fan on and off, the display changes the pressure reading, and when I turn on the headlights, that changes too. IT'S LIKE A VOLTMETER. I did what the instructions said because it's profitable profitable until 1987 crown, vic. whose purpose was restoration. Just wanted to add something that I thought looked sharp. I don't really care about idiotic lights. Either way, aim and score it a P, U. This stinks. Started looking elsewhere for a replacement.😒