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Review Summary
Integrated (not user replaceable)
725882017570
Slim and light transmitter that is fully water resistant and designed for all weather conditions. Slightly different to the T31 coded transmitter, the slim, light and waterproof T31 transmitter 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.