PowerTap PowerCal ANT+ Heart Rate Monitor with Speed/Cadence Sensor Size:

Through the use of these tools and the analysis of tens of thousands of power files over the years, the experts at PowerTap and the University of Colorado Boulder have identified patterns, which can correlate an athlete's heart rate to power across all real world conditions. We've utilized this knowledge to create a technology that provides power based on this correlation, in the real world and in real time.

No, it's not as precise as our PowerTap. Yes, it's a great tool, is incredibly easy to use, and is compatible with any existing ANT+ compatible display. Simply pair it to your display, and off you go!

We're all familiar with the key difference between a power meter and a heart rate monitor: that heart rate is a response to the work you're doing, whereas power is the actual work. The algorithms in PowerCal translate heart rate data into the vernacular of power-based training -- watts, kilojoules, peak power, etc. Use the PowerCal with the included PowerTap Speed Sensor, which can be configured to detect speed or cadence.

It could be one of the best investments you make in your training. So if you're ready to take your performance to the next level, let PowerCal help get you there.