Optimized for use with flared handlebars the lever delivers a wireless cockpit that is compatible with three satellite shifter options and features Shimano Front Shift Next functionality to maximize rider customization options.The new dual control levers also employ a gravel-optimized body shape cross-section for seamless integration with flared handlebars. Rounder in shape, the transfer from handlebar to hood is smoother and creates a larger surface area to help eliminate pressure points.ST-RX825 - Hydraulic Disc Brake DUAL CONTROL LeverWireless Di2 Connectivity2 x 12-Speed Dual-Control LeverGravel-specific brake lever and bracket ergonomicsNew flared drop bar optimizationAnti-slip coating on brake lever surfaceThree Di2 buttons per lever for E-TUBE PROJECT Cyclist app customizationReplaceable coin cell batteries (2 x CR1632) with expected lifespan of 3.5 to 4 yearsWeight: 415 grams / pair