Allow patient to reach standing position from sitting position; helps combat against muscle atrophy, pressure sore, osteoporosis and other disorders associated with immobility. The springs located on the back of the electrical wheelchair can be adjusted for softer or firmer suspension. Dynamic controller controls speed, direction indicator, horn and light; also, displays warming system, battery levels and condition. Ergonomically designed for pressure relief. Adjustable part: armrest, legrest, controller, backrest, seat lift. Equipped with anti-rollover wheels to prevent losing balance; go uphill and downhill more securely and stably.