WARMER FOR CAR, WHICH WORKS BY POWER SUPPLIED BY CAR, JUST CONNECT IT WITH CIGARETTE JACK IN CAR, ALSO CAN BE USED AT HOME. NO FREON GAS USED, ENVIRONMENT FRIENDLY, KEEP DRINKS & FOOD COLD IN HOT WEATHER OR WARM IN COLD WEATHER- COLD OR WARM SWITHCH SELECTOR TRANSPARENT COVER FOR EASY LOOKING INSIDE, LED DISPLAY WITH BLUE LIGHT AS BACKGROUND,- COLD & HEAT ARE TRANSFERRED THROUGH COATED ALUMINIUM LINER.- WHITE, RED, BLUE, CLARITY DOOR, DC12V/AC110V, DC12V, AC220V/DC12V COOL TO 20 BELOW AMBIENT TEMPERATURE.- QUALITY APPROVAL CE. UL. ISO9002