Multi-Function: Powered by any device with 5V USB port output, such as your computer, desktop, laptop, tablet, portable power supply, etc., simple and convenient. USB Thermos Coaster: about10.8*10.8*1.6cm/4.25*4.25*0.63in. Keeps your drinks warm. Fast and safe, USB insulated and easy to wipe clean. Easy to Clean: The surface of this USB thermos is very easy to clean. All you need to do is wipe the surface with a damp cloth and you're done. Operation Simply: You just plug it into a USB socket and start working. You can take it wherever you need it. It's so convenient! Widely Used: Suitable for multi-function, ceramic cup, metal cup, etc. Suitable for coffee, tea, milk and anything else you want to keep warm. Description: This USB thermal cup mat can keep your drinks warm. Its fast and safe. The surface of this USB thermos is very easy to clean. It's very convenient. uitable for coffee, tea, milk and anything else you want to keep warm. Specification: A: Biscuit Brown B: Cookie Blue Material: Environmental Protection Plastic + Electronic Components Size: about 10.8 * 10.8 * 1.6 cm/4.25*4.25*0.63in Weight: about 110 g Voltage: DC5V Current: 2.5 A Input interface: USB Cable Length 1.0m Surface Temperature: 75-80 Suitable Cup: Heat Transfer Fast Flat Cup Packing List: USB Thermal Mat*1 Note: Due to the lighting effects and shooting angles, there is color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size. This product can only be kept warm, not heated, constant temperature heating can be maintained, the surface heating temperature between 75-80 degrees. The water temperature in the container can be maintained at about 40-45 degrees, but the ambient temperature and container style will affect the water temperature. Uneven bottom of the cup, vacuum cup, blow molding bottle and thick bottom cup will affect the heat preservation, do not use. Support computer USB port and output above 5V1.0A mobile power supply