FSA K-Force WE Shifter 2 Speed BlackThe FSA K-Force WE Shifters use wireless ANT+ or Bluetooth Technology to activate derailleurs for quick and efficient hydraulic disc brake shifting. There is reach adjustment fine tuning to get the optimal positioning. The unidirectional carbon lever blades look great with Black and Silver Graphics and are super lightweight, weighing only 308g for the pair. These are powered by common CR2032 Batteries. Compatible with FSA K-Force WE 2x11 Drivetrains.840031033666