The Shift:R, made by Cinq5, is the first thumb shifter available for the Rohloff SPEEDHUB or Pinion gearboxes. It replaces the stock Rohloff or Pinion twist shifters and cable box/cable pulley. The system features separate shift levers for high and low gear. It also allows riders to use full size grips rather than shortened grips designed for twist shifters. Shift lever are the same between Rohloff and Pinion versions - just the ratchet box that attaches to the SPEEDHUB/gearbox changes.
Note that Pinion version only works on Pinion C-Line gearboxes. It is not compatible with Pinion's P-Line gearboxes.
How to change cables: https://www.youtube.com/watch?v=2aWv6UyGTlM
View of ratchet mechanism: https://www.youtube.com/watch?v=y0TuA_RJsXE