Free shipping on The Cat Eye Double Wireless Cadence. Cat Eye exclusive ID coded double wireless system User friendly single transmitter (left chainstay mount) 3 windows display 4 readouts Functions: One cadence zone, resettable total distance, resettable distance unit, lap number, lap timer, split timer, lap distance, lap average cadence, lap average speed, current speed, average speed, max speed, current cadence, average cadence, max cadence, total pedal revolution, elapsed time, total time, clock time, trip distance, total distance, second elapsed time, second trip distance, second average speed, and dual tire sizes