Very nice and tested. The different versions are different in regard to power supplies and batteries. I opened the unit by placing a screwdriver in the crack and popping the back plate off and replaced the common button battery- which you can easily buy, with a used one I had. I also used two AAA Batteries after twisting the unit apart. It seemed to be in excellent condition. I cycled through menus, reset the unit for a new user, and checked the temperature probe, which was working. Includes instructions. Very helpfull as this is a highly intelligent and detailed machine.
