Product details smart heating coaster has 3 adjustable temperature levels about: 55/65/75degree. Keep your coffee at a comfortable temperature in the office or at home and avoid your drink cooling quickly in the cold winter, so you can enjoy a constant temperature drink all year round.Plus,the cup heater will automatically shut off after 8 hours of inactivity. Don't worry if you accidentally forget to turn it off. The bottom of the heater is always kept below 55 degrees Celsius, so there is no need to worry about damaging the table by overheating(Do not touch the heating surface after turning it on or off for a period of time).Next,the mug heating pad is designed with a LED digital display that allows you to know the real-time temperature. The heating panel adopts a waterproof design, which can effectively prevent damage from splashing water or cup capsizing.So,the cup warmer is suitable for most cups of different materials: ceramic cups, glass cups, metal cups, stainless steel cups, milk cartons and high-temperature resistant plastic cups. A thin, flat, frosted cup base will give a better warming effect. Suitable for mugs with a flat bottom and a diameter of up to 3.15 inches.Finally,cup heater allows you to enjoy a warm cup of coffee, milk or other beverage at any time. It will be the perfect gift choice for your friends, family or lover for Thanksgiving, Christmas, New Year, Valentine's Day or any other special occasion. Don't worry if you accidentally forget to turn it off. The bottom of the heater is always kept below 55 degrees Celsius, so there is no need to worry about damaging the table by overheating(Do not touch the heating surface after turning it on or off for a period of time). [LED Digital Display and Waterproof Panel]: The mug heating pad is designed with a LED digital display that allows you to know the real-time temperature. The heating panel adopts a waterproof design, which can effectively prevent damage from splashing water or cup capsizing. [Suitable for Cups] The cup warmer is suitable for most cups of different materials: ceramic cups, glass cups, metal cups, stainless steel cups, milk cartons and high-temperature resistant plastic cups. A thin, flat, frosted cup base will give a better warming effect. [Best Gift Choice]: cup heater allows you to enjoy a warm cup of coffee, milk or other beverage at any time. It will be the perfect gift choice for your friends, family or lover for Thanksgiving, Christmas, New Year, Valentine's Day or any other special occasion. size13.8*11cm. weight149g. colorwhitegreenpink. pack*1pcsWith USB charging cable.