The Polar Transmitter belt is an integral part of Polar Heart Rate Monitors.

The Polar T31 coded transmitter is a slim and light accessory to Polar Heart Rate Monitors. With its unique coded technology, it blocks unwanted signals from other electrical devices, ensuring disturbance-free transmission of your heart rate data.

Comfort first and foremost!
The ergonomic design of the Polar T31 Coded Transmitter makes it a comfortable, virtually imperceptible device to wear regardless of conditions. It is 30 percent smaller in size and 25% lighter than its predecessors.

Coded technology for convenience
As more and more people use heart rate monitors today, preventing cross talk from other devices in group situations at the gym or when jogging with a friend becomes essential.

Built to last
The rigorous standards to which Polar T31 Coded Transmitters are designed guarantee maximum quality. Each transmitter delivers up to 2500 hours of operation or five years of use exercising 10 hours a week. Polar transmitters are ECG accurate and fully water resistant to 100 meters.