Polar F4 Men’s Heart Rate Monitor Watch (Black Thunder)
Featuring a new, slim design, the F4 is packed with innovative training features to help you toward your exercise goals, including:Zone Pointer: A visible and audible feature on the display of your fitness heart rate monitor showing your target heart rate zone and where your current heart rate is within that zone. Polar OwnCal: Shows your energy expenditure during one exercise session as well as your accumulated kilocalories during several exercise sessions. (more…)