This slim, light and waterproof T31 Coded transmitter offers coding to prevent cross-talk from other electrical devices for accurate measurement of your training. ECG (electrocardiogram) accurate and built to last with up to 2500 hours of training usage.

…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.

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

Great to have another while washing your other elastic strap, or just to have another on hand.

"Our robust ANT wireless heart rate monitor with softer, more comfortable chest strap and superior battery life eliminates cross-talk with other devices to reliably measure and send heart rate data to help you train in your zone."

Measure your heart rate with (continuous) or without (non-continuous) a chest transmitter. Many features are included like target zone, calories, recovery timer and time of day.

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

This strap is compatible with older Polar Heart Rate Monitors (usually 7-8 years old or older).

This heart rate monitor has a soft fabric strap and is more comfortable than ever before. Plus, it's optimized for use in congested areas like gym classes and starting lines.

…transmitter made from a soft, fabric material. The electrodes, which pick up the heart signals, are integrated right into the strap for added flexibility and comfort. The Coded feature eliminates interference from other heart rate monitors. The F11? is the closest thing to having your own personal trainer…

…HotFix? to give it faster satellite reception. This model ships with a new waterproof soft-strap heart rate monitor, streamlined and more comfortable than ever, yet rugged enough to withstand swimming (note: heart rate data not available while monitor is in water).

…tell the story. It's a complete 180 from any other fitness product you've ever seen. Now you can accurately monitor your heart rate with One-Touch Technology-and no bulky chest strap. Now you can count your steps, calories burned and distance with a built-in accelerometer-based pedometer. And now you can…