Short Cage Shadow Rear Derailleur (12 speed)
Shimano are likely to introduce DURA-ACE R9250 sometime 2021. Not much is known about this yet, but this is going to be a 12 speed system, semi-wireless and that it'll use a new battery, the BT-DN300.
This derailleur features a charge port, LED, button and an EW-SD300 type port used to connect the derailleur to the battery.
CyclingTips wrote a pretty good article on the new system (speculation), read more on their page.
Note that the derailleur pictured on this page is the previous generation DURA-ACE derailleur, not the RD-R9250.
BikeRadar published a page on prototypes of these derailleurs being used in races, with photos shot by Cor Vos.
Details & Specifications
|Shimano model number:||RD-R9250-SS|
|E-Tube Port type:||SD300|
|Component series:||DURA-ACE R9250 (Road)|