Use four diode.Color: Black+RedMaterial: Metal+PUVCurrent: 200AVoltage: 12VLength: 320mm (Red: 320mm, Black: 230mm)Anti-overcurrent, anti-reverse charge, against electric shock and short-circuit proof.Fit for most car jump portable starters.Usage of Car Jump : Connect the red battery clamp of jumper cable to the vehicle's positive (+) battery and connect the black to the negative pole.Plug the cord of jumper cable into the jumper 's socket.Start the vehicle.Cautions: Red clamp connect to the positive(+) battery terminal, black clamp connect to the negative(-) battery terminal.Do remove the clamps in 30s after the vehicle started.Do not connect and/or attach two clamps together, it may cause danger Keep this appliance from children.Quantity: 1 pcsPackage Contents: 1 x Jump CableNote: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.