We got this unit from an Estate type sale. It was Labeled good working, but that is all we know about it. It comes with the 66B4-25 Connecting Block with the plug in Cord connecting them together. Without having a way to fully test this, we have to sell it as is. But remember , it was Labeled good working and they were very honest about all the other items we purchased from them, so It is most undoubtedly perfect working. Please make sure this is what you want. If you force a return you will be responsible for all shipping and an inspection fee.