Note: This product maintains warmth. It does not heat cold items. 【USB Rechargeable, Easy Operation】 USB charging, can be continuously connected to a computer, etc., and can be charged anytime, anywhere. Low power consumption, no batteries required, and can be used continuously. 【Coffee Warmer for Keeping Warm】 Keeps various liquid beverages such as coffee, tea, milk, and soup warm at a constant equilibrium temperature of 55°C. 【Description】 Convenient for storage and portability. The equilibrium point is 55°C, and the actual temperature may vary depending on the weather temperature, the thickness of the cup material, the volume, etc. Made in China. Includes instructions in Chinese. Free Shipping