Our independent research & development electric jack obtained the national patent ?improving the traditional lever principle and screw theory , design the lock device and automatic overloaded power device, making the hydraulic system characteristics vividly, is the jack industry revolution. The practicality and safety is better than traditional jack, has small volume, light weight, easy to operate, and carry, no wearing, exquisite design, long service life, rise and fall steady etc character. And using car 12 V power, applicable to all kinds of cars, jeeps, lifting. And get the best favor science come out.