PsmGoods Set Cooling and Heating Functions As One Mini USB Powered Fridge for Beverage Drink Cans in Cubicle/Car and Home Office Which Can Be Placed Within Two Drinks 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