Shimano Boitier de connexion Potence DI2 SM-EW90-A 3 Ports Black

Connection box for Shimano DI2 SM-EW90-A stem mount - 3 Ports This connection box is compatible with Shimano Ultegra Di2 and Dura-Ace Di2 electric groupsets. It will be used to connect the transmission handles with the rest of the parts of the group. It also has an indicator light which indicates the state of the battery and any malfunctions. This box is attached to the stem using a specific support. With its 3 ports , it is suitable for a road bike unlike the 5 port box, which is more practical for a triathlon bike.