Vector 3S Plug and Play watt-measuring pedal system with a sensor. If you want to surpass your personal best in your next competition or Gran Fondo, power is always the most reliable method to assess your performance. Unlike other power meters, the sensors in the Vector 3 are located directly in the pedals, providing you with reliable data during every training session. The Vector 3 system with dual sensors records the power output of the right and left legs independently. The Vector 3 measures total power, cadence, and power distribution between left and right, as well as advanced cycling dynamics.