Shimano GRX ST-RX825 12-Speed Di2 Wireless Shift/Hydraulic Brake Lever Ride where you never thought possible. The long-awaited Shimano GRX 12-speed Di2 series has officially arrived; introducing the newest generation of the world's first gravel-specific groupset. This GRX RX825 Shifter/Brake Lever is the heart of this new GRX system, with a new wireless shifter design, updated lever shape and ergonomics, and more. The fully wireless shifter design creates a cleaner cockpit without the need for wires or cables, and a 3-4 year battery life. The redesigned lever shape improves ergonomics for use with flared handlebars, including a smoother bar-to-lever transition, a raised hood head, and an additional gravel-optimized shifter switch position. The levers are compatible with satellite shifters to meet the needs of every rider, while Front Shift Next functionality allows for unbeatable rider customization options. Shift how you want to, ride where you never thought possible with the new Shimnano GRX ST-RX825 Di2 Shifter/Brake Levers Features New wireless cockpit design eliminates the need for messy wires for a cleaner, easier-to-set-up cockpit Up to 3-4 year shifter battery life using easy-to-change CR1632 coin cell batteries Textured lever hood and an anti-slip lever coating for increased control in bumpy and wet conditions Redesigned hood body and bracket shape for improved flared drop bar ergonomics when riding on the hoods Satellite shifter compatibility with a gravel-specific third shift button location Front Shift Next functionality for unbeatable rider customization options Specifications Shift Lever ST-RX825Recommended Brake Caliper (sold separately)Shimano GRX RX825Shift Lever Speeds (rear)12Shift Lever Speeds (front)2Shifter Type Di2 Electronic Satellite Shifter Compatibility SW-RS801-S/T/E | Shimano | Grx Di2 St-Rx825 Shift/brake Lever Left 2 Speed