This portable refrigerator has the functions of cooling, heating and keeping warm. The hot and cold switch is convenient to control, COLD is for cooling, and HOT is for heating.The capacity is 7.5L, which can hold 6 bottles of 596ML mineral water and 12 cans of 330ML canned beverages.The 12V car cooler is equipped with a cooling fan to prevent the fan from clogging, the sound emitted is around 40 decibels, almost no sound, you will not notice it at all during driving. You can use it to freeze everyday food, even in a hotel room that doesn’t have a refrigerator, so you don’t have to worry about it going bad.