This is a USB heating coaster, made of high-quality material, and practical. The simple but chic design makes it more likable. Very convenient for home use and office use. Suitable for keeping warm for drinks, coffee, tea water, milk and etc. Features - Material: Aluminum alloy, plastic. - Size: About 12.00X12.00X2.00cm/4.72X4.72X0.79inch. - Keep your coffee hot all morning long with this coffee cup warmer. - Beautiful and compact design, which can keep the beverages warm all day. - The surface is smooth and the texture is good. with a wet towel, and it is as bright as new. - The excellent performance of our product will bring you a good experience. - It is also an intimate lovers, family, friends and colleagues. They will be very happy. Specification - Rate power: 18 W. - Rated voltage: 220 V. - Rated frequency: 50 HZ. Package list: 1 x heating coaster 1 x USB cable