This AIO is decent for the most part. The box contains a wiring diagram, the device itself, several gaskets for mounting, a cable for connecting the battery and a capacitor. As mentioned, it lacks a current sensor and black box capabilities. This is very bad as I like to see when the battery is getting low by checking the current state. Just something good, but not a deal breaker for me. Black box functionality would be nice too, but I'm fine with that too. They're nice, but not what I need all