The Orange CX NuVinci is all new from Gazelle and features the Bosch Mid Drive System coupled with the revolutionary NuVinci Harmony Automatic gear system. With the Harmony Advanced Controller model, the cyclist selects and fine-tunes a cadence set-point by twisting the shifter until the blue RPM display indicates the desired setting. With the Harmony Base Controller, the rider chooses one of three factory preset cadence speeds and activates the system by simply pushing a button on the controller.