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- Fits 25 to 54 inch chest size
- Slim, lightweight, and waterproof design
- Average battery lifetime is 2500 hours of use. Non user replaceable battery
- Individually coded to pick up your heart rate monitor and not others nearby. This eliminates cross-talk with other electronic devices in the same area.
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.