BM-DN100 Di2 External Battery Mount

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Battery mount for the externally-mounted SM-BTR1 Required to connect the Di2 system wirelessly to the eTube app Backwards compatiblity: allows to use all the latest Di2 wireless fu nctionalities on older eTube Di2 groups at a minimal cost -01: long mount, for external cable routing -02: short mount, for internal or external cable routing Attributes Misc Short, M4x16mm screws included Show more