The Ex N’ Flex EF-250 is for people with little or no control over lower body movement. In passive mode, the legs are rotated by the electric motor in a motion similar to cycling. In active mode you can assist the motor to move the pedals with your own muscles. The unit has a bio feedback display, forward and reverse switch and 3 speeds. The adjustable height and crank arm settings help with proper alignment whether the user is seated in a chair, wheelchair, or scooter. Includes 40″ leg strap to control lateral leg movement (purple band).