The F series heart rate monitors (HRM) are easy to use products with basic features. These products guide you to exercise at the right level and motivate you to carry on with your exercise program until you achieve your fitness goals. If there´s a reason for exercise, there´s a reason for Polar! Every Polar HRM is ECG-accurate and water-resistant. Entry level heart rate monitor. Guides you to exercise in your target zone. Polar F3 is rewarding the user on his/her way to a better fitness with target heart rate zone limits. New simplified use and great design. Guides you to exercise at least 30 minutes per day with visualized fitness bullets in the display, rewarding every 10 minutes workout. Shows the heart rate and elapsed time during exercise. Enables you to check the average heart rate and total time after each session. Large easy-to-read display. One-button functionality. You can set target heart rate zone limits and target heart rate zone alarm on / off.