Shimano DURA‑ACE SW‑RS801‑E Satellite Switch Pair w/ Extra Long Cable Genuine
Designed for use with Shimano Di2 electronic shifting systems. Shimano DURA‑ACE Di2 (R9150, R9170). Shimano Ultegra Di2 (R8050, R8070). Use as front/back change switch or secondary shifter on aero bars.