Garmin Forerunner 15 GPS Bundle Small. Run with all your heart. The Garmin Forerunner 15 GPS running watch has you covered as it tracks distance, pace, heart rate, calories and personal records. Need a bit of motivation You can stay on top of your fitness goals between workouts with activity tracking features that remind you when it's time to move as well as counting steps and calories burned all day. At the end of the day you can upload that killer workout to the Garmin Connect online community where you can save, plan, and proudly share all the progress you've made.The difference between this model and the Garmin Forerunner 15 GPS Bundle Large GN FR15L is just a matter of size of the watchdisplay screen the functionality is identical.