The Cubii Go Portable Elliptical has built-in wheels and a retractable handle to make this seated under-desk elliptical easily portable. This model features an extra-large, illuminated LCD monitor, lightweight build, retractable handle, built-in wheels, and the patented flywheel. The Cubii Go Portable Elliptical is designed to easily roll from room to room and can be stored away with ease when not in use. The compact, lightweight design includes a retractable handle, built-in wheels, and wheel cup chair locks that secure the unit to any rolling office chair. The large, illuminated display screen is easy to read and allows users to monitor their workout stats even when watching a movie or exercising in a dark room. The ZeroGravitii Flywheel is the largest flywheel of any model and provides the smoothest stride available, enabling increased strength and mobility without stress on the joints, knees, and back. This portable under-desk elliptical provides 8 levels of resistance. To increase the resistance, simply turn the knob clockwise. The higher the number, the higher the resistance. The manufacturer recommends beginning at Level 1 and increasing the intensity gradually over time. The Cubii Go requires simple assembly. Insert the pedal tubes into the flywheel and the pedal wheel with the base of the unit. The unit is designed to be pedaled both forwards and backward so users can choose which direction works best or even alternate between the two. When pedaling the elliptical, the feet move approximately 12.25 inches horizontally for each full cycle of the pedals, so each foot (both left and right) has its own stride length of 6.125 inches. The Cubii App provides users access to more than 300 expert-guided studio workout classes, and users can manually enter their workout data to track progress in strides, mileage, active time, and calories burned. The compact, lightweight, seated under-desk Cubii Go Portable Elliptical provides users with a comfortable way to keep their legs moving. Cubii Go Portable Elliptical Instructions Cubii Go Portable Elliptical Specifications: Measures overall: 24.5 inches long, 17.25 inches wide, 9 inches high. Item weighs: 20.07 pounds. Materials: Steel, ABS plastic, ferrous steel and rubber. Includes: Cubii Go Portable Elliptical, Cubii App. Power: Two 1.5V LR03 Alkaline AAA batteries (not included). Assembly: Simple assembly required. Insert the pedal tubes into the flywheel and the pedal wheel with the base of the unit.