Take your training to the next level with the Polar V650 Cycling Computer with H6 Heart Rate Sensor. This bundle includes Polar's H6 Bluetooth wireless heart rate sensor, letting you take full advantage of the V650's heart rate features. You can see exactly which of your five heart rate zones you're in at any given time, and even set the computer to alert you when you leave a target zone. Heart rate data is recorded by the V650 for later analysis in apps like Polar Flow. The included sensor is sized M-XXL, which fits chests 27 to 60" around. It is also compatible with many third-party fitness apps for use without the V650 cycling computer.