This tire jack uses the carbon dioxide to pump up the air bag to lift the car. To put into use, connect the air bag to the pipe with single direction valve. When the car is idle, join the cone-shaped rubber pipe with exhaust pipe, for the carbon doxide to enter into the air bag. In normal circumstance, it takes only 30 seconds to fully pump up the air bag to lift the car to whatever height requirement and remains that height level for 45 minutes. After use, revolve the valve to release the air. It takes 10 seconds to drain. The whole operation is an easy, simple and quick.