The heart rate monitor that fits your lifestyle Put on the watch, press a single button and youre ready to go. The PC 3.11 is the ideal entry level heart rate monitor for those looking to begin heart rate based training whether in the gym, walking or jogging. The PC 3.11 can also be used as a stopwatch when the chest belt is not worn. The large two line display features the heart rate and training time to the nearest tenth of a second. The extraordinary design entices users to continue wearing this watch even after their workout.