Review on Acouto Digital Voltmeter Ammeter Motorcycle by Derek Faseworld

I like the way this thing is made and the way it looks, but without instructions the ability to measure current is a little obscure. It has 3 pins on the back, one with +, one with - and one in between without any marking. Connect positive and negative and you get a voltage reading, but. How does it measure amps? Anyone who has ever abused a multimeter knows that if you have no idea what is going to happen when you plug in an ammeter and something small or major is about to happen, you are probably doing it wrong. How many amps can it measure? Is it necessary in the series? Does it only measure current when connected to an external induction coil that is not included? WHO KNOWS. I bought it on a whim with no particular use, played with it for a minute and put it away. I'm sure whenever I find a use for it and dig it up again I'll figure out what an amp is or figure out how to blow smoke out of this tiny $5 trinket. One or the other for sure.