Lsgoodcare Mini USB Powered Set Cooling And Heating Functions Fridge For Beverage Drink Cans in Cubicle Car Home office-Sliver USB mini fridge,Connected to the USB port of the computer can be powered Can be placed within two drinks,Set cooling and heating function as a whole, coffee / tea / drinks for heating or cooling treatment . No battery,Built-in LED lights Operating voltage: 5V DC Maximum power consumption : 10W Use Small size, light weight, portable Home and office can be applied