about this project Three-Level Temperature AdjustmentUse this coffee mug warmer to keep the liquid temperature constant. Three temperature settings can be adjusted at will: one light mode: 50C/122F, two light modes: 55C/131F, three light modes: 60C/140F. Leading SafetyIf there is no operation for 8 hours continuously, the heater will be turned off automatically. Safe Electricity Use - Low Power ConsumptionThis cup warmer is not an induction cooker, low energy consumption and low power consumption, it takes about 40 minutes to heat cold water. It is recommended to pour warm water into a cup and place it on a thermos cup to keep warm. Surface WaterproofThe surface of the heater can be wiped clean with a rag and a little detergent. But never put the entire heater in water, or flush it directly with water. The electrical plug must be unplugged before cleaning, and the socket must be dried before being used again. BEST GIFT CHOICEThe coffee mug warmer is a great gift for your lover, dad, mom, wife, husband and all your loved ones on Valentine's Day, Christmas and New Year.