The Black Gold Adjustable Multi-Wave Iron from Hot Tools offers you four different wave shapes. Have fun mixing styles to achieve a unique look: whether glamorous or natural. For all hair types. How to use: On dry hair: select a strand and close the iron plates on it. Start at the roots and end at the ends of the hair. Technical information: The iron closes automatically after two hours of use. 4 styles of adjustable plates included. Universal voltage.