1. Our electric cup heater can slow down the cooling of hot drinks; mainly keep beverages such as water, milk, tea at the ideal temperature for a long time, and you can enjoy your favorite beverage at a perfect but not too hot temperature. You can choose the temperature by touching the "temperature button" to keep or heat the temperature of the beverage to 55/65/75℃. 2. This mug heater has an automatic shut-off function after working for 4 hours. After turning off the coffee heater, the heater will keep hot for a while. Equipped with an LCD display, making this coffee cup heater very smart to use. 3. The 3.15-inch large heating plate coffee heater is suitable for all coffee or tea lovers. Please do not use plastic cups or double-layer insulation cups. Use a thin-walled, flat-bottomed or slightly concave-bottomed cup to get the effect. Suitable for tableware, stainless steel cups, ceramic cups, milk cartons, glasses, etc.