Feature: 1, Made of high quality plastic material, safe and non-toxic, odorless and healthy. 2, It can be used to heat your milk, tea, coffee and so on. 3, Lightweight and portable, easy to carry, it will not occupy much space. 4, It can be used repeatedly and durable for long time use. 5, 3 gear of temperature adjustment. 6, Suitable for school, dormitory and office, easy to use the cup cushion. Tips: 1, The plug of this product is the China standard version, it can be used normally with the converter.The product does not include a converter, you need to buy it yourself 2, Products include only heating coasters, other accessories demo in the picture is not included. Specification: Working power :20W Input voltage :110-220V Gear temperature: 55C /65C/75C Product size :182*124*44mm Material: ABS+Silicone+Electronic components Heating method :PTC semiconductor heating Constant temperature method :NTC detection