Polar F4 Men’s Heart Rate Monitor Watch (Black Thunder)

Amazon.com

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 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. You can set daily (more…)