Maintain optimal temperature: This mug warmer not only can the cooling speed of hot coffee, But also can heat your coffee up to (55-65-75). and keep this temperature whole day, which is neither too hot nor too cold, you can sip your coffee at any time, without waiting. Safe & Reliable: Thanks to the microgravity technology, this coffee cup warmer can shut off/on auto. Just plug the adapter into outlet, then put your mug on and the coffee warmer will work auto, take it away, the cup warmer will off auto. Suitable for most cups: The Smart coffee warmer has 4.4Inch diameter heating area. It can be fit most cups, such glass cup,stainless steel cup, Ceramic cup etc. for better results, we recommend using flat bottom glass cup or stainless steel cup. Placing a lid over the mug will also help retain heat. Waterproof design: The cup warmer for desk was covered with a layer of thermal conductive glass without need for security concern for occasional spill and it is easy to clean,safe and reliable. Winter's Gift: keep the beverages(Coffee, tea, milk etc) warm whole day, making it a great gift for lover, dad, mom, wife, husband, grandparents and all your loved on Valentine's day, Thanksgiving and Christmas, and other special occasions to express your sincere care. Note: This coffee warmer for desk is capable of keeping your hot beverages warm enough for drinking when you used a suitable mug, please do not expect it to heat your cold beverages to scorching hot in a short time. It is designed with low power consumption to keep your hot coffee or tea always warm. Product name:Dazzling warm coaster Product model:HX671 Rated voltage:5V Lighting type:colorful dazzling light Product size:112x112x29MM Rated power:8W Rated frequency:50HZ Temperature adjustment: three-stage adjustment(55/65/75) Colour:White Material:ABS Package Contents: 1 * Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.