1Designed to make hot steam, heat your hair evenly and promote the absorption of nutrient solution or perm liquid. 2Independent on/off button, automatic heating, heat preservation, moisturizing. 3Adopts quality material, corrosion resistant, heat preservation, energy saving, easy to clean. 4Self-protection designs, if the water is gone, it can automatically stop working, safety is guaranteed. 5Built-in dual heating cable provides fast heating and is safer to use.