shimano-sw-rs910-di2-drop-handlebar-internal-frame-junction-box-2-port-with-charging
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shimano-sw-rs910-di2-drop-handlebar-internal-frame-junction-box-2-port-with-charging, Shimano Di2 Frame Junction BoxFrame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mountAll Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctionsUse Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/Item Specificationskeyword searchEW-RS910 Shimano Di2 Junction Box Junction Box UPC: 689228890879