HKSIGNA3 wall mounted led light box Store Sign Holders crystal acrylic photo frame advertising display

I need to know how long the cord is to measure length from electric outlet?

Is the background/border around the image always black? Looks like its part of the frame... or is there a way to get a white border?

Is this back-lit or side-lit? Do I need back-lot film or regular poster paper

What type of print is needed for this? A regular paper print, or need to print posters on acrylic?