What is the Shimano Dura-Ace ST-R9270F-R Di2 lever with caliper?

The ST-R9270F-R is the right/rear combination of Shimano's Dura-Ace Di2 STI shift/brake lever paired with its matching hydraulic disc brake caliper for the rear wheel. This integrated package delivers the wireless Di2 electronic shifting and hydraulic disc braking of the Dura-Ace R9200 groupset in a single purchase. The right lever controls rear derailleur shifts and the rear brake, with the flat-mount hydraulic caliper delivering Dura-Ace-grade power and modulation at the rear wheel.

Part of the Dura-Ace R9270 Di2 system. Requires Di2 battery, E-Tube wiring, and compatible R9200/R9250 groupset components. Flat-mount caliper. Sold as right lever with rear caliper only -- pair with ST-R9270F-L for the complete lever set.