Polar T31 Coded Transmitter and Belt

At the heart of your training is the coded T31. 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

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

Polar T31 coded Chest Transmitter belt, for m and s series HRM's, plus F6 and F11
For all of the above you may also use the newer WearLink strap
(For S520, S720i, S710i, S725, S625x, RS200, RS200SD use T61 or Polar Wearlink)