NALACAL HUD Heads Up Display for Car, OBD+GPS Multi-Data Monitor Digital Speedometer Head Up Display, Overspeed Alarm RPM Water Temperature Turbo Pressure Smart Gauge for Most Vehicles After 2008

Awesome little gadget! My car didn't come with a turbo-boost gauge to give me visual data in the car. So I purchased this simply because I noticed boost pressure in one of the photos. It does so much more. Basically, if your ECU sends the data to your OBD, it'll give you a reading. It'll also read some codes and give you a chance to clear them. It's give you avg speed of your journey, fuel consumption, vehicle inclination, total time of your journey, and allow you to set alarms for speed, pressures, temps, etc. Brightness is great, and there's a lot of displays to choose from. Not everything is completely customizable, but if you're patient, you can find the system you truly want to monitor in the menus, and set an alarm limit. For the money, it's small, lightweight, easy to read (leave the brightness on AUTO, it'll dim for darkness and get really bright in high sunshine).