Usage of Car Jump :1. the red battery of jumper cable to the vehicles positive (+) battery and the black to the negative pole. 2. Plug the cord of jumper cable into the jumper socket. 3. the vehicle. Starting Current:300A Output current :350A Input Voltage:12V Strong Clip with EC5 Plug Connector (Fit for car jump portable ) Cautions: Red to the positive(+) battery terminal, black to the negative(-) battery terminal. Do remove the in 30s after the vehicle started. Do not and/or attach two , it may danger! Keep this appliance from children. Colour:Photo Color Material:Plastic + Metal Size:Overall length: 320MM Package Contents: 1 x Jump Cable Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.