USB coaster for cat. Material: magnetic silicone ring, which can increase the heating area at any time, rotate or remove the size compatible cup type at will. The bottom of the cup should be flat to ensure a good connection between the cup and the insulation pad. Do not touch the electric heating panel when the USB heater is working to avoid burns. < p>Perfect for reheating coffee, tea, hot cocoa and any other beverage that needs to be heated at home, in the office or outdoors. It always has a hot drink in store for you. Specifications: Name: USB cat coaster. Specifications: Approximate diameter: 5 inches; height: 4.2cm. Power supply: USB. Rated power: 30W Three-speed constant temperature: 55/65/75 . Note: It can keep your hot drink at a constant temperature, but it can't heat your cold drink. Includes: 1 x USB cat coaster Why buy it: light weight, compact size, easy to carry, suitable for most stainless steel cups, baby bottles, ceramic cups, glass cups, etc. Operation : Powered by any devices with output USB port, such as your computer, desktop, laptop, tablet, power bank, etc., easy and convenient. [Three speed adjustment temperature]: 55C/65C/75C three-speed adjustable, more convenient. [Material]: Silicone magnetic ring is evenly heated, safe and durable to use . Place of use: keep coffee, tea or other other hot drinks hot without worrying about high temperature and high oxidation. Ideal for home and office to keep you warm in cold weather.