This Simtamy 12-Volt Electric Car Jack is ideal to have on hand for daily use, especially emergency roadside tire changes. Don’t get stuck on the side of the road changing a flat tire with a manual jack. This 2 Ton capacity jack is fully automatic, powered by car's cigarette lighter or battery clamp(12V DC). With the push of a button, the car can be raised and lowered from 12-37 cm. The Cross groove saddle prevent slipping from vehicle. Machine will auto stop when it lifts beyond the height limit. This is more convenient for teens, elders or peoples with limited mobility. Specification: Input Voltage: 12V DC Max Current: 15A Rated Current: 13A Rated Power: 100W Max Loading: 4400 lb (2000 kg) Lifting Height Range: 4.7 -14.7 in. (12cm-37cm) Power Cord Length: 11.5 ft.(3.5m) Working Temperature: -20?+70? Packing List: Electric Car Jack: 1 pc Spare fuses: 3 pcs Gloves: 1 pair Manual hand crank :1pc Battery Clamp Connecting Cable: 1 pc Power Cable: 1 pc Warning: Please read this manual carefully before using. 1