Yes, with all Exxentric Flywheel devices the resistance is variable, dynamic, and unlimited. The resistance is based on the power input and the level of Inertia used for each exercise:
The biggest difference between Flywheel training and traditional Weight Training is the use of Flywheels. Flywheels create Variable Resistance allowing each repetition to be a maximal repetition, using all the power in the muscle that is exposed to the resistance. You can read more about the benefits and explanation of Variable Resistance here:
The kBox offers 70+ exercises for your entire body and the kPulley 30+ exercises with focus on the upper body. Explore all the different exercises here: