Just plug it in! No need to use ice! Portable electric cooler plugs into 12V cigarette lighter or any 12V utility outlet, and cools to 39°F (22°C) below outside temperature. Quiet, long lasting brushless motor. Insulation keeps contents cold. Can be used horizontally like as ice chest for automotive use or sits upright for use as a home, office or dorm refrigerator. Adjustable shelf provides organizational flexibility and functions as a tray in the horizontal position and as a shelf in the vertical position. Swing-up side handles slide up and pivot out for easy lifting and carrying. Can be used with optional external AC converter for indoor use.