This is an aftermarket BLITZ meter. It connects to the OBD port. Depending on the vehicle, you may need to wire a separate power source. The case of the button on the side of the meter has come open, so it has been repaired with adhesive. If it opens again, please secure it with adhesive suitable for plastic or resin. Currently, it doesn't come off even when pulled. In reality, you don't use the buttons much after the initial setup. Please remove the double-sided tape and reapply. Other than that, there are no particular problems. In the photos, the needle indicates engine RPM, the digital information at the top is vehicle speed, and the bottom is water temperature.