Aftermarket HU especially the multimedia units come with an HDMI input. Drawback is the lack of touch. C|S/Zadatech doesn't support touch either, which is why they resort to using a joystick.
If you want to use a different screen with the C|S/Zadatech product, just give them a heads up and they'll see if they can get their SBC to work with the display as long as it supports HDMI.
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