Maybe I live in the dark ages but the only one Ive seen is by Cyberdine.....I think they look pretty cool, but the problem I have with them is that I like to see the needle sweep and go into vaccuum as well , which these don't do(?). My analog gauge also keeps me alert of vaccuum leaks etc......maybe someone else has an opinion on these digital things.....ps the oil pressure one I heard is pretty neat too...