Product Overview: This cup warmer is a convenient item that can be easily used with a USB connection. Functionality: By warming the cup, you can keep your drink warm for a long time. It is especially suitable for use in winter or in the office. How to Use: You can start using it simply by connecting it to a USB port. While it's difficult to warm cold drinks with this, it does have the effect of keeping warm drinks from cooling down. You can easily enjoy a warm drink for a long time. Used 1-2 times. Please note that it will be shipped without the box, just the item itself. ◎ Operation confirmed. Also, since it is stored at home, please understand that it is a used item. Please read the profile before considering a purchase.