Comes with a reflectorized screen that sticks to the windshield to prevent the double image from the laminated glass. I didn't want to use that so I fabricated a mount with its own screen. I'm still looking to mount it into a permanent location, preferably centered over the instrument cluster. But that's going to take some thought.
Cool little unit! Also (upon startup) tells system voltage, has high temp warning and an alarm which can be set to go off after a set number of hours to warn driver to take a rest. Plugs into OBD port. I was a little worried about that but it hasn't caused any problems or CEL's, YET! We'll see!