The Shimano EW-RS910 Junction (A) is a required component when wanting to upgrade to a clean front end, devoid of wires. It allows one to run Di2 cables through the handlebars/stem/frame to acheive a clean wire-free look.
This junction A is required to connect the shifters via E-tube wires to the down tube junction wire.
The EW-RS910 can be used either as a specific frame mount or handlebar end plug mount.
It features a 2-port design (battery level indicator & charging port).
Gear index setup switch to allow fine tuning via shifter buttons.
Like all Shimano Di2 components, it comes with reliable and secure water resistant connectors.
E-tube EW-SD50 wires not included.