... .C(on/off)which is coin signal.On panel choice switch, which is the coin signal,20ms is the quick signal ... is the slow signal, suit the normal fun machine.VR switch is sensitivity conthol for coin filtrating ,clockwise turn(+),it accept ... .2.Counter available.3.Suitable all the coins diameter.4.Timer Switch.Product parameters:coin diameter: 18mm - 31mm coin thickness: 1.2mm ...