Junction box connects via SD50 E-tube wires to four different points: front derailleur, rear deailleur, front wiring harness, and battery mount
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Shimano Dura Ace Di2 SW-R671 TT/Tri Shifters
Shimano Di2 9071 Barend Shifter
Electronic Dura Ace Di2 bar-end shifter 2x11 especially for TT/triathlon bars. The revolution of shifting. Direct, fast and precise. The one-button operation minimizes movement and maximizes the aerodynamic efficiency. Compatible with Dura-Ace Di2 11-speed systems as well as Ultegra Di2 10-speed E-tube electronics.