Make your iPhone® into a heart rate monitor. This key fits into the 30-pin connector slot, and then wirelessly links to your fitness measuring devices, including heart rate sensors, speed and cadence sensors, foot pods or power meters.
- Compatible with iPhone 3G, 3GS, 4, 4S, iPod touch, and iPad.
- Works with Garmin and Timex sensors, plus those from many other manufacturers. For a full list of compatible ANT + units you can visit the vendor's website.
- Very low power usage.
- Sends and receives signals up to 3 metres (unobstructed).
- Free apps are available (and paid options) to display, save, analyze and inspire your workout.