Lite Duplex Digital This is a smaller, more compact version of the Deluxe Digital, and operates the same functions. Available in both red LED-type display and easy-to-read LCD display. The following circuit board(s) are compatible with the above topside: 59-138-1005, 59-138-1037, 59-138-1042, 59-138-1045, 59-138-1046, 59-138-1683. 8 Conductor Cable.