BM-DN100-S, Battery Mount for SM-BTR1, Short, For External or Internal Battery Cable Routing

Description

* 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 functionalities 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