There are many times in life that require heat preservation, such as milk, coffee, drinks, etc. This product is designed for home, office, etc. It can be used directly plugged into the USB port, which is energy-saving and convenient. The shape is exquisite and beautiful, the function is excellent, and the cost performance is extremely high! Product Name: USB mug mat Material: iron shell + aluminum plate Product Specifications: D103xH16mm Color: deep / light wood grain / white porcelain grain / water droplets / matte black Power: 5W Voltage: 5V Current: 1000mA Power supply method: USB Product single weight: 87g