The FatTrack PRO DIGITAL Body Fat Measurement System is a highly technological professional-grade skinfold caliper to be used by individuals, personal trainers, and other healthcare professionals to monitor body fat %. The unit is programmed with 3- and 7-site Jackson-Pollack formulas for estimating body fat % through skinfold measurements. Each FatTrack PRO comes with a fully functional mini-CD of Composition Tracker Body Fat Tracking Software.