The Vector 3S is a single sensing pedal system that allows direct power meter measurements, thanks to an internal sensor that is housed directly in the left pedal assembly, allowing reliable and accurate data. The single sensing system, uses the forces detected to measure cadence and power. With no complex drive-train or wheel components and no external sensors, the Vector 3S is easy to install and transfer to any bike. The Vectors offer a sleek design for cornering clearance Bluetooth and ANT+ connectivity with 120 hours battery life and Look Keo cleat compatibility. The Vector 3S is a simple and great way to enhance your training sessions letting you follow your performance power output.