Polar T31C Coded Transmitter

At the heart of your training is the Polar T31C Coded Transmitter. 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 Compatible Products : FT80 G1, FT80, FT60 G1, FT60, FT40, FS3c, FS2c, FT2, FT1, CS400, CS300, CS200cad, CS100, CS100b, RS400sd, RS400