Description: The refrigeration main function is cool and heat, cool temperature is about 8-9 degrees Centigrade, and the heating can reach 40-65 degrees Centigrade. (The temperature in the fridge can be reduced to 8.5 degrees in 5 minutes. Don't mistake it for 5 minutes of what you want to freeze, even the household fridge is not so fast.) The USB refrigerator has a closed door design that allows your drink to ice for a long time beside the computer, and is easy to carry, as long as there is a place where the USB plug can be used. The unique interior space design can put one can of beverage. When the machine is working, the LED light will be bright?cooling as yellow?heating as red?. The heating and cooling of this product is based on the principle of semiconductor electrodes. It is recommended to use porcelain cups, metal cup for cooling and heating. When high temperature or humid environment occurs, some water droplets are normal when machines are working. To use dry cloth or towel to dry. Specification: Material? Plastic Size?9.5 x 9.5 x 20.5 cm / 3.74 x 3.74 x 8.07 inch Working voltage: DC 5V If you don't want to plug into the computer USB interface all day, you can buy a USB adapter to convert. Package Includes: 1 Piece Mini Travel Fridge 1 Piece Power Cord Note: 1.It is not allowed to heat carbonated drinks and other similar liquids on this machine. 2. Do not pour liquid directly into the machine. 3. This machine should be kept away from damp. 4. Do not touch the machine with a wet hand. 5. Please turn off the power when you don't using. 6. Keep the air vent clean and no clogging. 7. Reduce the time for the machine to be exposed to the sun. 8. Please allow slightly difference due to manual measurement. 9. Color may be slightly different since different monitor. Thanks!