Being derivatives of the original digital bicycle speedo's, these haven't evolved enough for my liking in cars. The fact that nearly all of them have neutral lights should tell you something. The only good ones I've seen fitted in cars looked like they were the result of a lot of hard work. I've fitted a couple of the better KOSO units to two wheelers with varying success. One looked absolutely brilliant on a newer motorcycle, the other not so much on my old scooter. That said, both were a doddle to install, all the parts and connections needed were supplied, and both were able to be calibrated to within a hair's breadth over a mile. The one that didn't look good was eventually removed because it's silly size annoyed me every time I looked at it.
What I'm trying to say here is these can be expensive, do your research first by downloading a drawing and sticking it to your dash where you will be looking at it every time you drive. Can you see it properly? Is it big enough? Does it suit the vehicle?
I like the idea of digital displays but for me, looking at a row of needles is a lot easier to do when driving. Go the rally dash!
