Car Head-Up Windshield Display, Head-Up Display, OBDII HUD Head Up Display Color LED Projector Speed Warning System for Car Trucks

What a total waste of time and money

Pretty good for the price. Using this in an 18 year old car, not sure if the car's ECU is slow or if the unit is slow but it takes about a second to catch up. All in all I like it and it seems to work well.Update:I just got a 2012 Mazda 3 and put it in there. I haven't used it in months, been disconnected but it seemed to save all my settings, which seem to be pretty accurate for this car as well. However it reacts much, much faster in this car. It actually displays speed in real time, rpm is slow but whatever.

Great concept, well executed, but unreliable. It can read 80°C and then suddenly jump to 150 and back. No, the temperature is not changing instantly. The car is fine. The same happens with RPM, voltage, etc. It just isn't reliable.Even better, this sets off the alarms sometimes even if you set them to the max.

You have to be careful it only works on newer cars

doesn't work in Renault

Even after following the directions (unclear by the way) it still didnt work as I wanted I live in the US and would not go to MPH.