Wireless cadence kit will enable cadence for all Z series models and also provide data that gives power measurement in Z1, Z3 and Z3PC * Uses cutting edge industry standard Ant + Sport protocol 2.4 Ghz digital signal to keep speed transmitter and other rider signals completely separate * Discreet and clean design mounts to chain stay, downtube or seat tube * Comes with zip ties and 3 V battery * 5 Year warranty