HSC In-Car Jumpstarter is designed to jump-start the car in a fast and convenient way. It is operated 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 HSC In-Car Jumpstarter system do its work! It comes with an extra long durable 3 metre power cord for added mobility and convenience. Features : - Charges batteries by connecting cigarette lighter to cigarette lighter of the donor's car - Works with all 12-volt automobile vehicles (standard voltage) - Charges a weak battery in 5 to 10 minutes (For the exact charging time， please refer to the table on the on the bottom) - Extra-long 3 metre power cord makes it easy to reach from car to car - Comes with two 15A fuse for circuit protection What's in the box: - 1 x Car Jumpstarter 3-meter jumper Cable Cigarette Socket