Allow patient to reach standing position from sitting position; helps combat against muscle atrophy, pressure sore, osteoporosis and other disorders associated with immobility. High efficiency wheels, can be used in various occasions and space; flexible steering; suitable for both indoor outdoor usage. Driven by front wheels allows smoother turns. 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.