Shimano SW-R671 Di2 TT Barend Shifters make shifting simple and accurate with Di2 technology. Just a light touch, as delicate as a mouse click, is enough for the front or rear derailleur to instantaneously choose the proper gear.
The use of electrical wires instead of traditional mechanical cables prevents bad shifting caused by contaminants, corrosion, and straining, and also provides smooth gear shifts. Simply pressing tactile buttons allows for effortless and comfortable shifting even when your hands are cold.