Shimano BM-SN100 Extrenal Battery Mount - IBMDN100S2
$238.99
Shimano BM-SN100 Extrenal Battery Mount - IBMDN100S2 Item # 975787
Description
Battery mount for the externally-mounted SM-BTR1
Features:
- Required to connect the Di2 system wirelessly to the eTube app
- Backwards compatiblity: allows to use all the latest Di2 wireless functionalities on older eTube Di2 groups at a minimal cost