The other day, I found an unusual 3rd party memory unit for the Dreamcast. I can't find a brand name on it, it's all clear, so that you can see the circuit board. and in the area that usually has the LCD screen if it were a VMU, it has 2 red LED's. The right one lights up when plugged into a controller. Can anyone tell me more about this? Also, what purpose do the LED's serve?