Motivation by the Mile Forerunner 15 has an auto lap function that automatically alerts you when you complete each mile giving you a friendly beep & a backlit screen that flashes your time for that mile. When you complete your run & save it you'll see a summary of how you did including your total time distance average pace & calories. Forerunner 15 even lets you know when you achieve a personal record like your fastest mile or longest run to date. Train Indoors or Out For outdoor runs Forerunner 15 uses GPS to accurately record your time pace & distance. To track distance & pace when you hit the treadmill or an indoor track just pair Forerunner 15 with an optional foot pod which attaches to the laces of your shoe. Wear it All Day You won't have to worry about charging Forerunner every night. The rechargeable battery will last up to 5 weeks in watch/activity tracking mode or 8 hours when using it with GPS on your outdoor runs. Forerunner 15 has a water rating of 5 ATM (50 meters) which means it resists rain & sweat & can even join you for a swim. Get Connected With a simple connection to your Mac® or PC you can upload your activities to our free online fitness community Garmin Connect. Here you can see your run on a map get more detail on each mile see a daily summary of your activities & share with friends. You can also join online challenges & earn virtual badges for extra motivation. In the box: Watch Version Only Large size is colours blue/black & red/black. Small is teal/white violet/white & black/green. Forerunner 15 Charging/data cable Manual Heart Rate Version Large size is colours blue/black & red/black. Small is teal/white violet/white & black/green. Forerunner 15 Heart rate monitor with standard strap Charging/data cable Manual