Plastic Shell (Pp Material) Metal Inner Liner (Galvanized Sheet) Rapid Constant Temperature Heating: built-in high efficient heating element, it can heat the towel to the right temperature in 3-5 minutes and keep constant temperature to avoid overheating or cooling. Large Capacity Design: 20L large capacity, can heat multiple towels at the same time to meet the needs of family or commercial, avoiding cross contamination. Safe and Waterproof Material: made of PP material and IPX4 waterproof grade, anti-leakage, anti-dry burning, more peace of mind. Energy Saving and Quiet Operation: low power consumption design with noise reduction technology, energy saving and quiet operation, suitable for home or beauty salon use. One Key Intelligent Control: touch panel or remote control operation, support timer/temperature control function, the elderly and children can also easily get started.