The main camera is all you get (with the cord, etc). The back, or inside camera modules have to be purchased separately. They, all come with the necessary cables with the exception of the parking monitor cables.
While it supports 2 extra cameras it can only record from two at the time. Either "front & rear" view, or "front & cabin view" (ie save your money and only buy 1 attachment). Hopefully Rexing USA comes up with a firmware update that adds the functionality to record all 3 cameras simultaneously.
Some of the reviews are also mentioning that in 2 cameras recording mode it decrease the resolution, ie not record in 4k mode.
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