The F4 is packed with innovative training features to help you toward your exercise goals, including Zone Pointer and Polar OwnCal modes. The Zone Pointer is an audible and visual feature on the display of your F4 that shows you where your current heart rate sits within your target heart rate zone. Polar Own Cal, meanwhile, shows your energy expenditure during one exercise session, as well as your accumulated kilocalories during several exercise sessions. You can also set daily and weekly exercise goals in terms of calorie expenditure, helping you achieve both short-term and long-term goals.

Other features include a Fitness Bullet feature that shows a bullet on the monitor's display for every 10 minutes spent exercising/training in your target heart zone; a Time in Target Zone mode that calculates the amount of total exercise time spent in your personal target zone; water-resistance to 100 feet; a 24-hour clock with a day/week indicator and stopwatch; a large easy-to-read display with a split screen; a stopwatch; and a one-year average battery life. Sporting an attractive "red berry" housing, the watch carries a two-year warranty.

Manufacturer's Warranty
The original purchaser of this heart rate monitor is backed by a limited warranty that states that this product that the product will be free from defects in material or workmanship for two years from the date of purchase.

Note: Polar heart rate monitors are precision instruments; consumers are not advised to change their own battery. Polar recommends that all service be done by an authorized Polar Service Center which will include a warranty for 90 days on repairs and 6 months for batteries.

About Polar
The first EKG accurate wireless heart rate monitor was invented by Polar back in 1977 as a training tool for the Finnish National Cross Country Ski Team. The concept of "intensity training" by heart rate swept the athletic world in the eighties. By the 1990s, individuals were looking to heart rate monitors not only for performance training needs, but also for achieving everyday fitness goals. Today, the same concept of heart rate training is being used by world-class athletes as well as everyday people trying to lose weight. Polar is the leading brand among consumers, coaches, and personal trainers worldwide and the company is committed to not only producing the best products, but also being the leading educator on the benefits of heart rate based exercise.