Shimano Di2 External Battery Mounts

• All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
• Battery Not Included
• Battery case for SM-BTR2
• 6 E-Tube ports
• For use with Di2 external wiring setups, functions as junction B (frame junction box)

BATTERY CASE OF SM-BTR2,FOR BOTTLE CAGE MOUNT,W/JUNCTION-B, W/EW-SD50(250MM) X 1