This was the first thing I bought to my boat and it’s must for me now.
I check it when I start the engine and to make sure the alternator is working and when I turn the engine of I’m sure nothing is draining my battery.
Nice to have things running and know how much Amp everything is taking from the battery.
Another plus is the display, it works with a micro USB cable and connects wireless to the shunt. That means that you can have the display in the cabin, at the helm or with you connected to a power bank.