This is an I/O board for the Megatouch Maxx series of games. This works in conjunction with the Megatouch Maxx Motherboard that I also have for sale. This board will work with all Unicorn Motherboards. It will also work with the Mitsubishi boards with the audio on the motherboard! It will NOT work with the Mitsubishi boards without the audio (you need the Maxx Wide I/O board for those), or the Telco 586 motherboards (you need the Wide I/O board for those as well).