The Duplex Bike Combo Speed & Cadence Sensor uses both Bluetooth Smart and ANT+ connectivity tracking your speed and cadence data to any Bluetooth Smart compatible device, including all popular Android and iOS cycling apps and ANT+ bike computers. The unique design gives universal fitting to any bike frame sizes or configuration.  
 
To install, simply attach to the left side chain stay using the cable ties provided, position the magnets on the wheel spoke and crank arm parallel to the sensors.

The Bike Combo features a non-volatile memory function integrated into the sensor allowing the unique device identity to be held during battery change. This eliminates the need for repeat pairing after battery replacement.