They were not JAMMA, kind of like a glorified Jakks Pacific Pac-Man type PCBs in a cheap cabinet with monitor in one sense. One had a small PCB located under the control panel, and I want to say, the Midway had the PCB above the monitor with a replaceable cartridge to add more games (that never came out). The monitor is just some cheap tube TV. The six buttons were planned for a possible Street Fighter II (I would assume) since the Midway had the cart slot. I have one of each in my other jobs arcade (he got them pretty cheap) and I see them played quite frequently and not problematic. The sound is less desirable (quality of speaker, not sound samples). Games are adjustable-free play of course, lives, demo sounds, how hard game is, etc. It really isn't too bad having seeing them in an arcade environment on for 8 hours a day, every day for a couple years and holding up pretty well.