Winterworm Mini USB LED PC Car Refrigerator Fridge Beverage Cola Drink Cans Food Cooler Warmer (Red) Supports Cooler & Warmer and Suitable for cold & hot seasons With a cooler, off and warmer switch With built-in LED indicator ( green - cooler, red-warmer) Easy installation, USB powered, no driver and battery required, plug & play. Just minutes after plugging in the Fridge, the cold plate chills to the perfect temperature.