Plug in the power cord and click the on/Off button when the cup heater is off to set the scheduled on time. The selected time will continue to flash, indicating that the cup heater is in a predetermined mode. Once the predetermined time is reached, the cup heater will automatically turn on and start heating. Tap the On/Off button to select the timing time. When the thermos cup reaches the set time, it will automatically shut down to ensure safety. With our coffee cup heater, you can enjoy your drink at the ideal temperature. Its excellent heating and holding properties ensure that your drink stays at the perfect temperature for a long time so you can savour every bite. Coffee or tea lovers never want their hot drink to get cold before they drink it, as this will ruin their excitement. Our coffee cup heaters are available in 5 temperature options - 135 ° F, 145 ° F, 155 ° F, 165 ° F and 175 ° F, so you can drink your warm coffee or tea at the temperature you want. Peace of mind with our default 4-hour automatic shutdown feature, designed for your safety and convenience. You can also personalize the automatic shutdown timer from 1 hour to 12 hours, ensuring that your mug heater fits perfectly with your daily life. The coffee cup heater has a large 4.4-inch heating panel that works with most flat cups, such as tumblers, ceramic cups, metal cups, and even mini coffee POTS. It can also be used as a candle heater. Use a flat or thin-bottomed glass for better results. A mug warmer can be the perfect gift to bring warmth to your lover, dad, mom and all loved ones on birthdays, Valentine's Day, Thanksgiving, Christmas and other special occasions to show you care.