Feature： Designed to heat beverages and refrigerated beverages on car cigarette lighters, and maintain warmth at 140°F, Or cool to 21°F, with electronic thermostat function. Excellent fit for drivers, enjoy a hot coffee or water on the way Or a Cool Beer and beverages on the way. product description： Project: Car smart cup Product size: 3.9*3.9*6.3 inches Rated voltage: DC12V Rated power: 36W Working temperature: -21°F -140°F Note: 1.Only for 12V models Car 2.Caution when handling as it contains hot or cold beverages. 3.Do not touch the inside of the cup when on heat. 4.Do not use heat with bottles or cans with carbonated beverages. Package Contents: 1X car warm and cold cup 1X car charger 1X manual