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T31 coded™ transmitter

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
  • No user replaceable battery
  • Transfers heart rate information while swimming
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