I read the manual a few times before plugging anything in. They were easy to read and understand, and the pictures immediately helped me set up and work. It works via the OBD port (on-board diagnostics) and from there I entered my info and vehicle identification so it knows where to go. Good quality and the screen is just the right size for easy access to information without squinting. It's a 5-inch screen with good color reproduction and brightness in all lighting conditions, and I found it easy to hold. Very good. Four stars ⭐️⭐️⭐️⭐️!
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