This unit was a 1984 smartwatch with a computer programming base. I only have the base unit. You could program it to set a personal calendar of activities, deliver memos, run as a calculator, play games, etc. It has Microsoft basic as its program language. The watch served as the computer screen. The optional power cord is missing, but it is a universal one. It uses 3 AA batteries. The battery cover is cracked, but there doesn’t seem to be any damage to the terminals. The unit is clean. Controller measures 8” x6” Includes ROM pack, transmission circuit that connects the watch to the controller, printer unit, roll of paper, original box, instruction manual, programming manual for the computer and warranty book. When I plugged it in, it didn’t make any sound, so I am not sure, if it simply needed to pair with the watch or if something else is happening. It does have a back with screws. If you are good at making electronic repairs, the unit is easily accessible.