Convenient operation, high safety and strong ability to cross obstacle are the prominent advantages of the unlimited electric wheelchair. The wheelchair can cope with different kinds of outdoor obstacles, including stairs, safety island, mud wow, sand and so on. Whether go on the stairs or go down the stairs, the wheelchair can opetate positive; and it can cross the obstacles does not need infrared ray to detect the obstacles. In addition, our wheelchair is equipped with Dynamic Shark remote control, without any complex operation and suit to more users. The patent technology "seat level synchronous movement” make your center of gravity has always been consistent with the ground, which greatly enhance the safety and security of the user. 4-wheels drive can move steady and smoothly on the mud wow and sand roadway, which grealy increase outdoor travel space; so that your travel room no long restricted to the broad flat ground, but the kinds of nature environment you have long dreamed of.