Eliminating undesirable joint stress and promotingfunctional fitness.NEW StrideLock™ feature (see over)Ergonomic body position for comfortTotal body workout. Smooth stepping motionFits users from 4'6"- 6'4" (137-193 cm)Accommodates users up to 400 lbs. (181 kg) Drive TrainThe self-powered T4r starts easily operates quietly and can be used in most locations. User controlled step lengthLow inertia startupInstant free coasting start and stop action for safetySelf-powered with no plug-in requiredQuiet belt drivePower output range of 0-800 wattsSeatThe comfortable ergonomically-designed T4r seatswivels 360° to allow for easy on and off access. 360° seat swivel with 45° locking intervalsPadded contoured back provides added supportSeat adjusts 15” (38 cm) forward and backwardWheelchair heightFlip-up arm supports. Easy arm adjustments up to 15" (38 cm) to fit yourbody size and preferred range of motion. Sturdy grab ringComfortable rubber hand gripsClamshell release mechanism "