... core technology, high-quality motor, powerful torque.2,Gear select high-quality materials, and treated by high-frequency ... high-strength composite materials ( bulletproof glass materials), tenacity of anti-skid, it protect paint from damaging .4 ... freely within the range, stop automatically when out of the range.6,Double gears strengthen the structure, ... TUV/GS,CE,UL,ROHS,ISO9001:2000. Electric car Jack