Exclusive adjustable resistance system for lower body exerciser. Includes instructions and two AA batteries. Compact design is ideal for the office or travel or keep it home. Features a unique adjustable resistance system for low impact exercise. Double hydraulic separated cylinders system which copy stair climbing sensation. Dual-hydraulic cylinders work independently, replicating stair climbing. Built-in digital computer calculates elapsed time and number of steps. Ideal for toning the waist, calves, hips and thighs while burning calories. Built with strengthen steel and hard plastic footrests that last longer....