Have an extra strap for when the other strap is in the wash, for another user or if your elastic strap is showing wear.

…measures your heart rate but also seamlessly adapts to your body shapes so you feel as if it?s not even there. The transmitter consists of an electrode strap and a connector, and with its new side-clip mechanism, it?s just as quick to put on as it is to take off.

…field to improve resolution and eliminate interference. The WearLink+ W.I.N.D. Transmitter Set is a result of that dedication. With a soft textile chest strap it?s the latest generation of Polar?s proprietary heart rate sensing and transmission technology. Polar W.I.N.D. technology eliminates interference…

The most practical way of measuring your cycling session is with our advanced wireless cadence sensor. It measures your pedaling rate as revolutions per minute in real time and average time so you can compare the technique of your ride against previous rides.