{"product_id":"shimano-ew-jc304-di2-junction-box-4-ports-use-with-ew-sd300","title":"Shimano EW-JC304 Di2 Junction Box - 4 Ports, Use With EW-SD300","description":"Shimano Di2 Frame Junction Box\u003cbr\u003e\u003cbr\u003eFrame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount\u003cbr\u003eAll Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions\u003cbr\u003eUse Di2 system checker to update component firmware from http:\/\/e-tubeproject.shimano.com\/","brand":"Shimano","offers":[{"title":"Default Title","offer_id":41541778243647,"sku":"tga-25-shimano-IEWJC304","price":28.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0768\/3539\/files\/3295c4ba-cc43-5bbe-ba31-4a8a8506c0f0.png?v=1741287439","url":"https:\/\/thegearattic.com\/products\/shimano-ew-jc304-di2-junction-box-4-ports-use-with-ew-sd300","provider":"The Gear Attic","version":"1.0","type":"link"}