The new Shimano EW-RS910 Bar-End or Frame Mounted Internal A Junction/Charging Port is part of the Dura-Ace 9050 Di2 release. This new A-Junction has finally given a cleaner option for Di2 bike cockpits by removing the A-junction from beneath the stem and moving it inside the handlebar end or inside the frame on bikes with a compatible mounting point in their frame like the compatible versions of the Trek Madone and Pinarello Dogma.
*Note: Bar end mounting does require an entry and exit hole for the e-tube wires in the handlebar. Many bars with internal cable routing allow for this or the Pro Vibe Handlebar is designed for this purpose.
This product is expected to become available for purchase and ship on Friday, December 18 2020