Dimensions: 19 cm x 6.5 cm x 2.5 cm Portable Shoe Rack: Keeps boots dry and warm. Protects shoes from moisture and sweat to keep your feet comfortable. Can be programmed for 4, 8, or 12 hours. Fast Heating, High Temperature Resistance, and Anti-Oxidation: The newly improved PTC heater features five-factor thermal protection technology, ensuring safe and reliable consistent heating. Heats up quickly in seconds, with up to 99% thermal efficiency. The heat is distributed at a constant temperature of 45 to 65 degrees Celsius, preventing damage to shoes caused by high temperatures and drying them gently. 360-degree heat dissipation: Multiple heat dissipation holes are densely distributed on both sides of the device, creating a circulating heat flow within the shoe compartment during heating, ensuring even hard-to-reach corners are dried. Made of high-density ABS + PC material, resistant to pressure and high temperatures, it won't burn or deform easily. Suitable for various types of shoes: The design is compatible with different types of footwear, such as leather shoes, sneakers, dress shoes, snow boots, cotton slippers, etc. Before going out, your shoes will be dry and comfortable, preventing athlete's foot. Whether in spring, summer, autumn, or winter, it provides a faster drying experience than traditional shoes.