Item Type: Electric Mug Warmer_x000D_ Material: ABS_x000D_ Rated Voltage: EU Plug AC100-240V_x000D_ Rated Power: 20W_x000D_ Diameter of Heating Plate: Approx. 90mm / 3.5in_x000D_ Weight: Approx. 285g / 10.1oz 1Smart Heating: When you put a cup on the heated coaster, the coaster will automatically heat up after recognizing the cup. 2Keep Warm Function: In addition to the heating function, the coaster also has a constant temperature insulation function to keep all your favorite beverages warm. 3Portable Size: This coaster is small and portable so you can take it with you on the go, so you can enjoy a warm beverage anytime, anywhere. 4Boost Your Happiness: Drinking a warm cup of water in winter is a small thing that can greatly enhance the happiness of life, with this coaster, you can always drink warm water. 5Wide Compatibility: This coaster is suitable for cups of different sizes, such as glass, stainless steel, ceramic, etc. You just need to make sure the bottom of the cup is flat.Do not use plastic cups or double vacuum cups.1 xElectric Mug Warmer 1 x Instruction