Fast heating in 30 seconds: the hair straightener comb can heat up in 30 seconds. It has iron tooth ceramic bristles that glide through the hair without causing frizz or damage. You'll end up with shiny hair that has almost zero vol. 6 temperature levels: the straightening comb can heat up to 160~210 degrees / 320~410 degrees Fahrenheit, for a total of 6 adjustable temperatures, provides the ideal amount of heat for different hair types.30 minutes auto-off: The comb has the lock function, it can shut off automatically after 30 minutes. Avoid hidden security risks caused by forgetting to turn it off. Security: This hair straightening brush protects you as always. It features a plastic frame with V-shaped iron teeth that will protect you from all angles. However, you can still feel the heat, please do not touch it directly during operation. Multifunction: You can easily use this ceramic hair straightener to straighten medium/long hair/beards. With this brush you can straighten even thick and curly hair. The hair straightening brush rotates 360 degrees so you can straighten it from any angle. Tips: Before using the straightener, make sure the hair is dry, tangle-free and free of any hair.