Shimano Di2 EW-SD50 650mm Power CableThe Shimano Di2 EW-SD50 power cable is used for all electronic gear groups starting with the Ultegra 6770. Not compatible with the first Dura Ace Di2 (7970). The cable is available in numerous lengths and is suitable for both indoor and outdoor installation. Shimano Di2 EW-SD50 650mm Power CableThe Shimano Di2 EW-SD50 power cable is used for all electronic gear groups starting with the Ultegra 6770. Not compatible with the first Dura Ace Di2 (7970). The cable is available in numerous lengths and is suitable for both indoor and outdoor installation.Characteristics:- Electronic cable with 2 E-Tube connections.- Transmits interactive signals and supplies power to all components.- For external and internal installation.- Waterproof plug.REFERENCE: IEWSD50L65