You''re never far from a wall outlet with the Kensington Auto Power Inverter with USB Power Port. Power and charge your notebook, mobile or Smartphone, MP3, PDA, or any mobile device from your car by turning your cigarette lighter into a powerful wall outlet. There''s even a built-in USB Power Port for devices that charge via USB. Works with your own USB cable or purchase separately a Kensington USB Power Tip pack with retractable USB cable.