This is a used count sensor from the old Amos. It is a replacement part for when the count sensor malfunctions, causing too many or errors during loading of Amos GABIN, Monster, Kong, Pleasure, etc. It has been installed in a real machine and tested with AL tiles. There are 4 in stock. We have not tested it with transparent ALC tiles or Martel tiles on the white part. If you are currently using the above tiles, please consider the separately listed board with a replaced photo sensor. Please comment with the number of units you need before purchasing.