Apologies...I neglected to answer your second question re. an external display.
I have done this in the past, however, unless you can find a Monitor with a Composite Video Input, (Few and far between!) you will probably need a 'box' to convert the KN7000 video output signal (Composite Video) to the VGA standard, which is used on most computer monitors. You can find these devices on the internet. There is a 2 part Demo Video clip on YouTube....
Part 1 https://www.youtube.com/watch?v=xe9sWdYDD5I
and Part 2 https://www.youtube.com/watch?v=n4VxZsIvSbs
It demonstrates connection from a Nintendo games console to a VGA monitor but this should equally apply to the KN7000 to VGA Monitor.