Polar T31 Coded Chest Transmitter and Elastic Strap

Its purpose is simple: to transmit your heart rate to your wrist unit. Slim and light, the ECG (electrocardiogram) accurate transmitter is fully water resistant and designed for all weather conditions. It is built to last with up to 2500 hours of training usage and prevents cross-talk from other electrical devices for accurate measurement of your training. No user replaceable battery.

Water Resistant
ECG Accurate

Built to last with up to 2500 hours of training usage.
Prevents cross-talk from other electrical devices for accurate measurement of your training

Chest Strap Sizing:
“Med (25-54 Inches)”
“Large (33-63 Inches)”
“Small (23-47 Inches)”