Shimano EW90-B Di2 Cockpit Junction Box 5-Port. Note: Not for use with Shimano Flight Deck SM-EW90-B 5-Port Cockpit Junction Box connects up to 2 pairs of Di2 shifters to the frame junction box via 5 SD50 E-tube wires OEM front wiring kit for Dura-Ace Di2 9070 LED battery charge level indicator Rear Derailleur adjustment mode Internal Battery charging port Includes Junction Box Band (CY9082) and Junction Box Hook (Mounting Plate CY9081)