This slim, light and waterproof T31 doesn?t have the benefit of coding for interference free transmission. However, its purpose remains the same: to transmit your heart rate to your wrist unit ECG (electrocardiogram) accurately.

Comfort is key when training. That?s why Polar created the Polar WearLink?+ 31 coded transmitter belt. It not only 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…

This strap is compatible with T31 coded and non-coded chest transmitters and any T series exercise equipment.

…, use the WR601 to receive weather information and emergency broadcasts from the National Weather Service. With the non-volatile memory built-in, no need to reprogram your SAME codes when the batteries run out!"