The VECTOR J312V is a portable jump starter and power bank in a take along size. 700 peak amps of starting power instantly jump starts V4 and V6 cars and trucks. Powder-coated metal clamps are included. The reverse polarity protection assures that jumper cables are connected correctly. Plug your own extension cord right into the integrated AC plug for easy recharging The USB port and 12V DC port can be used for portable device or equipment charging. You can put your confidence in because we have been delivering quality products for over 25 years. 1 year warranty.