Need a power supply that does it all? Well Retrobit has this 3 in 1 AC adapter that works with NES, SNES and SEGA Genesis Model 1 consoles. It has two cables, one for NES and Genesis Model 1 and another for the SNES. Do not power on two consoles at the same time when plugged in. It doesn't say not to do this, but its just common sense. Don't know what SEGA Genesis model you have? Well the Model 1 is rectangular shaped with a headphone jack and a volume slider on the front. It also has a sliding power switch. The SEGA Genesis Model 2 doesn't have a volume slider or headphone jack and the power and reset button are buttons that you press down. This won't work on a SEGA Genesis Model 3.