The Ultegra ST-R8070 series shares the same Di2 electronic shifting technology as Dura-Ace, at a more affordable price. Featuring hydraulic-actuated operation and improved ergonomics for all-day riding comfort and performance. Compatible with hydraulic calipers. Clearer separation between the buttons ensures precise shifting even when the driver wears thicker gloves. Multi-Shift can be switched on or off individually for each switch. The buttons under the top cover can be programmed to control third-party devices. All features are customizable with Shimano's E-Tube app or PC software.