The Suunto T3c Multisport Pack provides GPS based speed and distance in all sports activities outdoors combined with versatile real-time training data and Training Effect. . . . . Suunto T3c Black . . . . Interface Free Digital ANT transmission and coding . . Training Effect in real time . . Speed and Distance with optional Pods . . Training Logbook on device . . Additional functions include: Real Time Heart Rate and Calories burned, watch with dual time, date, alarm, and stopwatch with splits and laps. . . . . Suunto GPS POD . . Suunto Comfort Belt . . . . Please see individual POD descriptions for more information . . . .