Product 3-Temperature SettingsFrom this winter,say goodbye to cold coffee and tea- Our coffee mug warmer has 3 temperature settings, you can choose the temperature by pressing the power button keeps the drinks temperature to 131/55 or 149/65 or 167/75. And is equipped with visual temperature, can display temperature numbers,allows you to easily adjust the cup warmer for slow down the cooling speed of hot beverage, revent curdling,improve your overall beverage experience. Automatic Shut OffSmart coffee mug warmer is equipped with a safety feature which will shut off automatically after continually working 8 hours. It prevents you from safety hazards by forgetting to shut off or low quantity beverage being over dried. Also, our coffee mug warmer has a manual-off option, which can manually end the heating.When the coffee mug warmer is working, the screen showing the temperature will light up, so you can find your drink without turning on the light at night. Concave Plate DesignThe heating plate of the coffee mug warmer is designed with a concave tray , which can prevent the cup from accidentally slipping and overturning. Suitable for most stainless steel cup, mug, milk box, glass cups and etc, use a thin-walled, flat, or slightly concave-bottomed mug for the best results.(Please use 5V=2A charging port for power supply). One Key OperationIt only needs a button to operates power on and off and switch the temperature. Press the button to turn on, the default temperature is 131/55, the temperature rises by 50/10 each time you press it, the highest temperature is 167/75, then press it again to shut down manually, easy to use, perfect to desk, night table kitchen island or living room side table, suitable for heating coffee, milk, tea, water or your candle wax. Simplicity & StylishUSB coffee mug warmer, simple appearance, stylish design, rapid heating and safe durable, small and light, can easy to take anywhere. Use gift box packaging, exquisite workmanship and with instructions, is the perfect gift for any occasion,pass your love and concern to your family members and friends. Package include:1 x Heating Coaster(Without Cup) Note: 1. Due to the different monitor and lighting effect, the actual color of the item may be slightly different from the color shown on the pictures. 2. Please allow 1-3cm error due to manual measurement. (1 inch = 2.54 cm) Thanks for your support :)