The H2 heart rate sensor allows you to monitor your heart rate on a compatible Polar device. The soft fabric chest strap seamlessly adapts to your body shape, bringing full freedom of movement to your exercise.
Provides continuous, accurate heart rate measurement using both 5kHz and 2.4GHz W.I.N.D. transmission
Transfers heart rate information while swimming with products which support 5kHz transmission* [*FT1, FT2, FT4, FT7, FT40, FT60, FT80, RS100, RS300X, RS400, RCX5, CS100, CS200, CS300 and all similar previous models] Soft fabric material feels like clothing on the skin
Slim and streamlined connector design
New and improved user-replaceable battery mechanism