Zyyini Coffee Mug Warmer, Electric USB Cup Heater Pad for Desk, Cup Warmer Heat Beverage Mug Mat Home Office Desktop Heated Coffee Tea Mug PadMade of high quality walnut wood and metal materials, heating evenly, healthy and durable to use.Powered by any devices with output 5V USB port, such as your computer, desktop, laptop, tablet, mobile power and so on, easy and convenient.Light weight and comp..