Minoura ant speedcadence sensor ant compatible sensor for use with live training pick up your speedcadence with this slimline easy to fit sensor and use live training to convert the data into the essential training aid displaying power etc on your iphone will interface with wahoo fisica dongle for use with iphone but is also compatible with an ant enabled receiver pickup and transmit the speed and cadence data requires 1 x cr2032 battery combined type low energy ant wireles