Ok have fitted this unit and works as it should however there are a few niggles, 1 there is no software supplied and the one that was directed to by Vevor is all in Chinese so have to find an alternative no help from Vevor. 2 the mounting screw holes could do with being keyhole not just holes as lifting the unit and trying to get screws in is a pain, 3 the alarm tone is so annoying although you can turn it off it is off for everything including button push why?.4 the bottom plate is held on with smallest screws ever and on the side so awkward why they cannot be put on the front and larger screws or clips is beyond me.
However it powers up ok and works as described and the screen is useful.