Garmin Bike Speed Sensor and Cadence Sensor<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Easy-to-install - Simply attach the sensors and ride. With no magnets or other exposed parts to line up， these sensors are easy to install， maintain and move between bikes. </span></li><li><span class="a-list-item"> Speed sensor - Attaches to the hub of either wheel and self-calibrates with your Garmin Edge to give you accurate speed and distance at all times， including indoors on the turbo trainer. </span></li><li><span class="a-list-item"> Cadence sensor - Fastens to any crank arm size and measures pedal strokes per minute so you can get the most out of your training. </span></li><li><span class="a-list-item"> Includes: Speed sensor， Speed sensor sleeve， Cadence sensor， Cadence sensor straps， manual </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51hXEI4JD%2BL.jpg" noproxy>