Self propelled Scissor Lifts Product advantages: It does not need any outriggers, one man operates on the working platforms;Moving forward,turning around and lifting up are easily operated.Short chargeable time and long dural time of the battery; Easily moved, spacious working platforms, smooth working condition and high working efficiency. http://www.sinolifter.com/ Moving method: The chargeable battery provides the power to move and steer around. Lifting Power:The chargeable battery provides the power to raise up the lift platforms. Working heights: ranging from 4m,6m,8m,9m,10m,12m,14m (Please refer to the Products Specification List) Applications: It is widely used for aerial installation & maintenance of the working sites without power supply and with smooth working grounds,such as hotels,grand hall,sport statium,large factory,workshops,warehouse,granary,bus/railway stations,hotels,airports,gas station and aerial pipeline.