Soft textile material feels like clothing on the skin
Slim and streamlined connector design
New improved user-replaceable battery mechanism
5kHz coded transmission, compatible with most Polar products* and compatible gym equipment in fitness clubs. Look for the Polar logo next time you go!
Transfers heart rate information while swimming with products which support 5kHz transmission*
Compatible Products: all previous models and FT series, RS100, RS300X, RS400, CS100, CS200cad, CS300.