I bought this gauge knowing it wasn't going to be the best. I have it to take sea calls while working on boats and PWC. I wanted a cheap counter after throwing a $200 counter in the lake. However, this gauge was not even remotely accurate. I had it wired in ohms which should be "OL" instead it gets it's own mind and gives me a reading. When the wires touch, it shows "1.1 ohms" what? The DC voltage of the battery was about 3 volts. I knew I was getting something cheap and inexpensive, but what I meant was that I expected it to work at least a little. Don't waste your money, spend a few bucks more. I have to do that.