Garmin Forerunner 610 GPS Enabled Sport Watch with Heart Rate Monitor. This watch is your perfect companion to prepare for a marathon.

Technical specification:

Weather-resistant, GPS-enabled training watch supports customizable data screens and advanced training plans Touchscreen interface for quickly and easily toggling data fields, adjusting settings, reviewing run history, and more Virtual Partner and Virtual Racer help you plan workouts and reach goals; Training Effect measures impact on aerobic fitness

Customizable vibration alerts for time, distance, calories, heart rate, or cadence; heart rate zone training with included monitor USB stick for wireless uploading of run data to Garmin Connect--map your activity, view lap splits, and explore activities from other users