Flawless shifting, superb ergonomics, and state of the art technology? Shimano's Dura-Ace Di2 Dual Control Levers embody all of these concepts. Utter simplicity and ease of use are the hallmarks of these shifters, with gracefully curved lever blades that offer two, easy-to-reach fingertip buttons. The shifting controls are easily accessible from either the hoods or the drops, so you'll have total control from any position on your handlebar. The E-Tube wiring harness is simple, clean, totally waterproof, and runs beneath the bar tape for a super clean look.