Product Description: Dimension: 160×112×113cm Seat height: 59cm Sitting surface width: 56cm Adjustable distance of lifting support: 20cm Adjustable distance of calf pad：47 cm Adjustable distance of assisting handle：35 cm Swing angle of calf support: not less than 120 °Dumbbell piece quality and quantity: 1.5kg each, 6 pieces in total; ★Hydraulic adjustable backrest, the angle can be adjusted 90 °~180±5 °. ★Free to stop at any angle in the zone. Function: Patients with limited joint movement for active and passive training of quadriceps resistance, also for knee traction. Product Usage: Suitable for people with limited knee joint movement for quadriceps resistance active exercise, also for knee flexion extension traction training. Features and functions: 1, calf brace swing range is adjustable. 2、Movement resistance can be adjusted by dumbbell piece. 3、The backrest cushion has two states, sitting and lying, so it can be trained in seated and lying positions. 4, The height of the calf back brace, calf pad height, and booster handle height is adjustable, suitable for people of different heights to train.