Specification: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 powered by any devices with output 5V USB port, such as your computer, desktop, laptop, tablet, mobile power and so on, easy and convenient. Great compatible with use at home and office, keeping you brew warm on cold days.Features:Made of high quality walnut wood and metal materials, heating evenly, safe 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 compact size, easy to carry and suitable compatible with most stainless steel cup, feeding bottle, ceramic cup, glass cup, etc.Keep your coffee, tea or other hot beverage warm up to 80, do not worry about high temperature and high oxidation, safe in use.Great compatible with use at home and office, keeping you brew warm on cold days.Specification:Condition: 100% NewMain Material: Wood + MetalType: Bright Wooden Grain, Dark Wooden Grain (Optional)Power: 5WVoltage: 5VElectric Current: 1000mAMax Working Temperature: 80Wooden Grain Width: Approx. 16mm / 0.62inchMetal Plate Diameter: Approx. 75mm / 2.95inchWhole Diameter: Approx. 103mm / 4.05inchWeight: Approx. 108-109gPackage:1 x Cup Warmer with USB Cable (Cups are Not Included)Note:Please don't use the recessed bottom cup, mineral water bottles, adiabatic vacuum cups or cups with thick bottom.It is only used to keep your tea or coffee warm, but not compatible with heating.Please allow slight deviation compatible with the color and measurement. Thanks compatible with your understanding.