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 36°F (20°C) below outside temperature. Quiet, long lasting brushless motor. Insulation keeps contents cold. Sleek, narrow design fits behind or between vehicle seats for use on the go. Convenient carry handle can also be used to prop the cooler lid open for easy access to contents. Can be used with optional external AC converter for indoor use.