The Shimano SW-R610 Di2 Remote Sprinting Shifters are designed to be mounted under the handlebar tape in the drop section. They are compatible with 11-speed Di2 systems and each shifter plugs into a dedicated port on the Di2 STI lever, without requiring any additional E-tube wires. However, they are not compatible with ST-7970 or ST-6770 Di2 levers. To access the shifter buttons, a hole is cut in the bar tape.