Wagan Easy Quick Jumper In-Car Jumpstarter is designed to jump-start the car in a quick and easy way. It is used by simply connecting one end of the easy quick jumper to the 12-volt cigarette lighter of the ‘dead’ car and then plug the other end into the 12-volt cigarette lighter of the donor’s car. Then let the Wagan Tech Automatic Power Charging system do its work! The red LED indicator lights lets one know of the charging status and once charged the green LED light will light up to let you know. It’s that easy! There are no dials, no switches, and no buttons. It comes with an extra long heavy gauge 18 feet power cord for added mobility and convenience.