The Shimano 12-speed Shimano GRX Di2 Dual Control Lever delivers fast wireless shifting for gravel and mixed-terrain riding. The ergonomic lever features raised hoods ribbed surface texture and an anti-slip coating on the brake lever for increased security and control. The hood body bracket shape is newly optimized for seamless integration with flared handlebars while retaining the gravel-specific third button location. To complete the cockpit RX825 levers are compatible with three satellite shifter options (sold separately) and features Shimano FRONT SHIFT NEXT functionality to maximize rider customization options. The GRX BR-RX820 2-piston disc brake caliper brings a high level of control to gravel cycling with enhanced modulation and a quick initial braking point. Despite its smaller construction the system is exceptionally quiet and easy to maintain.Provides a clean cockpit with fast and reliable wireless shiftingTwo easy-to-change CR1632 batteries are long-lasting with a 3-4 year lifeBetter comfort and control with anti-slip coating on levers raised hoods textured surface and optimization for use with flared handlebarsCustomizable shifting set-up features Shimano's FRONT SHIFT NEXT funcitionality that allows the user to program a single button to control the front derailleur; Hit the shift button once and the Front Derailleur moves up hit that same button again and it moves downFRONT SHIFT NEXT free's up a button on the bike for additional functionalityCompatible with Shimano's SW-RS801-S/T/E satellite shifter (sold separately)GRX RX820 2-piston caliper for 25mm frame mounts features 10% wider pad clearance to decrease brake noiseOne-way maintenance-friendly bleeding process for quick and easy prevention of air bubbles in the hydraulic systemIncludes finned L05A pads with a resin compound for enhanced heat dissipationDisc brake rotor sold