Practicality: Portable onboard coolers are very useful in summer and winter.1 x 4L Portable Small Fridger Fast Cooling Electronic Refrigerator Cooling FunctionRefrigeration Principle: Semiconductor TechnologyColor: pink,blackMaterial: ABSSmall and easy to move, large capacity, no need to worry about space.Minimum cooling temperature: 5°C below ambient temperatureMaximum heating temperature: 40°CThis mini fridge is ideal for picnics and trips, cars, hostels, and with this amazing fridge you can make your food and drinks fresh. Heat-cooling switch with one key, convenient to switch from the beverage cooler to the food heater, bring your lunch to work in the office, it can keep all day long.It can heat breast milk, iced drinks, quick cosmetics, etc.Operating voltage:12V/220V