Shimano EW-JC302 Di2 Junction Box

• Shimano Di2 2 Ports Junction
  
• Intended Purpose: Conjoining the wiring inside and outside the frame
  
• For use with EW-SD300-I type
  
• All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
  
• Use Di2 system checker to update component firmware
  
• Number of Ports: 2