USB Wood Grain Cup Warmer

This cup warmer mat is made of high quality walnut wood and metal materials, heating evenly, safe and durable to use, has natural walnut wooden grain and smooth to touch. It is powered by any devices with an output of 5V USB port, such as your computer, desktop, laptop, tablet, mobile power and so on. It is easy and convenient. Great for use at home and office, keeping you brew warm on cold days.