Protable USB Wood Grain Cup Warmer Heat Beverage Mug Mat Keep Drink Warm Heater Mugs Coaster Specification: Main Material: Wood + Metal. Color: Bright Wooden Grain Power: 5W. Voltage: 5V. Electric Current: 1000mA. Max Working Temperature: 80℃ Wooden Grain Width: Approx. 16mm / 0.62inch. Metal Plate Diameter: Approx. 75mm / 2.95inch. Whole Diameter: Approx. 103mm / 4.05inch Package Included: 1 x Cup Warmer with USB Cable(Cups are Not Included)