The iMaze Bike Combo with speed/cadence sensor features the power of Bluetooth Smart 4.0, wirelessly transmitting your bicycle data in real-timefor tracking, analyzing, and recording. When combined with the smartPulse app, it transforms your smartphone into a digital GPS bike computer capable of measuring speed, cadence, route, location and much more. http://www.imazecorp.com/portfolio-view/universal-bike-combo/
Attaching an accurate sensor to the rear chain stay of your bike gives essential data on your speed and cadence. By measuring, analyzing and recording both the speed of the bike as well as how fast it is being pedaled, will allow you to maximize your riding potential and track your progress.