Shimano 12S Di2 compatible CS low side rear derailleur IRDR7150E Black RD-R7150 34T-36T

The wireless unit, charger, and switch functions are all integrated into this compact design. Features include an LED status indicator, battery level display, pairing status display, and adjustment mode display. It also supports a wider gear range and a maximum low sprocket of 36T. Total capacity 41T