Featuring Servo Wave Action brake technology, the Shimano Dura-Ace ST-R9270 brake lever delivers modulation and control like never before. Wireless shifting keeps your bike looking clean while offering the fastest, most precise gear changes available. All of this resides in a dual control lever that employs the most advanced materials to offer lightweight and refined ergonomics that provide comfort and control for the most demanding conditions. The wireless connection provides a clean cockpit, enhancing the aesthetic of your bike while keeping shifting lightning fast. 1.5 to 2 years of battery life with easy-to-change CR1632 shifter batteries. Unparalleled ergonomics engineering refined with pro rider feedback. Raised hood peak improves ergonomics, while a longer hood body increases hand support. Compatible with satellite shifters. Servo-Wave technology optimizes brake control. Lighter, smoother lever action. Enhanced modulation thanks to an expanded braking control area. Carbon fiber brake lever and titanium hardware.