I can't answer detailed questions about this. I bought it off of Astromart and installed it. Everything works but because I can't polar align (too many trees to the north)and have trouble setting up my scope orthogonally, I can't get any accuracy. The computer shows the RA and DEC numbers moving correctly as I move the scope.
I am asking $275 ppd and it includes insurance. I can accept paypal (credit card ok) no extra fees or money order.
The computer, encoders (2048), brackets, instruction manual for installation of the encoders (Celestron), instruction manual for JMI-Mini Max are included. This is for a C-8.