Description of Suunto t4c Watch - Black Frost Your personal coach - adapting to your workout schedule, Suunto t4c knows what your body needs in order to achieve optimal physical condition. Features: Suunto Coach: automatic, dynamically adjusting training program to improve fitness Interference-free digital ANT transmission and coding Training Effect in real time Speed, distance, and cycling cadence with optional PODs Training logbook on device Suunto Comfort Belt for improved fit and feel Additional functions include real-time heart rate and calories burned, zone training, watch with dual time, date, alarm, and stopwatch with splits and laps.