Electric Jack makes the drivers repair the flat tyre quickly and ... the pressure. Guarantee the stability.5,Lifting Range: Jack can lift or lower freely within the range, stop automatically when out ... : use the manual hand crank to lower the car if no power when the car jacked.10,According to GS testing standard ... orange.13,Approval: TUV/GS,CE,UL,ROHS,ISO9001:2000. Electric car Jack