Ok so its missing the dc to dc cord that runs from main to 2nd screen ( powers both at same time) main screen works great. I did plug in the second screen and it works fine. They do have to be plugged in to work from what ive seen. You can still use them together bc they have a power plug for your car and a regular plug, youd just have to power them separately if that makes sense. Comes with 3 pairs of headphones that I didnt test, but I did clean.
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