The Polar T31 uncoded transmitter heart rate monitor
is at the heart of your training. Its purpose is simple, to transmit your heart rate to your wrist unit or excercise machine. 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. Transfers heart rate information while swimming It does not have a user replaceable battery.
- Compatible with: FT1, FT2, FT4, FT7, FT40, FT60, FT80
- And RS100, RS300X, RS400, RCX3, RCX5, CS500+, CS300