Dual Car 12v Outlet with 4 USB all Gadget ChargerDual Car Outlet that is 12v which gives you the ability to plug in 2 gadget that charge thru 12v cigarette lighter outlet. You also have 4 USB ports that are 6amp which will charge 4 different gadget at the same time. Fully compatible with iPhone, iPad, Samsung and hundreds of other devices. These days portability of gadget is what everyone want and way to keep them charged is what this does effectively and efficiently. It has a built in circuit