SOTHING Coffee Cup Warmer Insulation Coaster 3-Level Adjustment Cup Warmer Product Dimensions: 17 cm (length) x 13.5 cm (width) x 3.4 cm (height) Silent, Safe The insulation coaster makes no sound at all. It can be used on a desk, in an office, bedroom, or dormitory, and will not affect work or break time. Also, the insulation coaster automatically turns off after 8 hours of continuous use, ensuring safety. 3-Level Temperature Settings The SOTHING insulation coaster can be set to three temperature levels: 55°C, 65°C, and 75°C. It heats up rapidly to the set temperature within a few seconds and maintains that temperature until turned off. Unique Design Compared to similar products, the heating area of the SOTHING insulation coaster is expanded by 50%, allowing for larger cups (even teapots) to be placed on it. It also uses a special waterproof silicone cushion, so you don't have to worry about spilled coffee or water droplets seeping in. Specialized for Heating and Insulation Use the insulation coaster for keeping hot coffee, hot chocolate, or teapots warm, and for heating milk, cakes (please use aluminum foil). It is applicable to stainless steel cups, mugs, milk cartons, and glasses. Optimal results are achieved when using cups with a thin, flat bottom, or a slightly concave bottom. Please understand that the color and texture may appear slightly different due to reflections and lighting. Although it is a new, unused item, there is a tear in the box as shown in photo 10. Immediate purchase OK! It will be wrapped in bubble wrap and shipped via Mercari delivery.