Blips be it the fireworks of a finale an ideal rhythm climbing on the top or a deep dark place extracting the last kilojoule of effort on your bike split you want to adjust your gear with the twitch of a finger etap blip satellite shifters allow you to shift when you want where you want rear derailleur the sram red etap rear derailleur executes shifts the instant you demand it with military precision wirelessly itrsquos easy to set up clean in appearance and delightfully uncomplic