Product Features Housing Material: glass-fiber reinforced composite, bezel aluminum Calorie Counter: yes Target Heart Rate Zone: yes Training Program: Fitness Test: Chronograph: yes Pedometer: yes, (with foot pod, sold separately) Odometer: yes Altimeter: yes Altimeter Range: Route Elevation Profile: yes Barometer: yes Barometer Memory: Thermometer: no Digital Compass: yes Declination Type: Adjustable Declination: Computer Compatible: yes Backlight: yes Water-Resistant: yes, 50m Date Indicator: yes Weekday Indicator: yes Alarm Type: time Alarms: time Battery Type: rechargeable Li-ion battery (240mAh) Battery Life: (with 60 second GPS intervals) 25 hour, (with 1 second GPS intervals) 8 hours, (with ABC functions) 15 days Low Battery Indicator: yes Dimensions: 50.5 x 15.5 mm Face Size: 50.5 mm Weight: 2.5 oz Recommended Use: running, training, cycling, swimming AMBIT2 S HR Integrated GPS with heart rate monitoring and Suunto Apps for on and off track training. THE GPS FOR ATHLETES The Suunto Ambit2 S is designed to fuel your passion for sports. Latest GPS in a light and sleek design with advanced features for running, biking, swimming and more. Thousands of Suunto Apps available to add new features to your watch. Perform at your absolute best - every time, everywhere.