Infinitely variable regulation rather than switching of speeds - making e-biking a flow experience. In addition to the sophisticated NuVinci gears, the particularly compact and powerful Shimano Steps E8000 drive unit provides a powerful, harmonious boost. In lieu of classic changing of speeds, the OPERO has a stepless NuVinci hub. A rotary switch on the handlebar grip is used to adjust the gear ratio, individually and free from fixed gears. An additional highlight is the integration of the battery. Laterally removable, the OPERO has a 375-Wh battery which, thanks to TwinCore technology, can be extended with a second battery of the same size. Optionally, then, this city and touring e-bike with 750-Wh endurance performance is transformed into a miracle of cycling range.