【Official Twist Stepper】Stepper Twist Stepper SP-100 │ Beautiful Legs, Waist, Belly Fat Reduction, Quiet Design, Compact, Walking, Diet, Aerobic Exercise, Twist, Home Training, Muscle Training, Core Training, Step, Diet Equipment, Fat Burning, Foot-Stepping Health Equipment I have used it about 20 times in total after purchase. It can be used without any problems.