there is no junktion box it's the brainunit you can still buy the junktion and sensor's but the brain is no longer made as of about 2 1/2 years ago thats why I was happy finding one new in box that I know work's and hasnt been instaled but the only reason for selling it is I have my interest in some other parts for one of my projects and this would make it a bit quicker on buying those parts but if there are any question's feel free to let me know
thank
art