Thermographic systems supplied with 3 or more plates are equipped with an ITS optimal plate indicator to help you quickly and easily select the best plate. The ITS must be applied to the body at the precise location where cellulite or body fat testing is to be performed. After a few seconds, the ITS will show the optimal plate number. If 2 plate numbers appear at the same time, side by side, the plate with the higher number must be used. It is extremely useful, however, to learn how to choose the optimal plate without using ITS.