hair straightener---2 in 1 function: ceramic iron straightener + detangling brush temperature setting guide: 1. for thicker and curls hair, choose 410-446fahrenheit degree. 2. For common hair, choose 374-410fahrenheit degree. 3. For thin and soft hair, choose 338-392fahrenheit degree. Recommend to choose highest temperature at first, and then reduce the temp lever according to your hair centigrade to Fahrenheit convert: press ""+""""-""at same time notice: long press 3 seconds to turn on/off. Instructions: 1: please keep hair dry and neatly groomed before using. 2: insert the plug into proper the socket 3: turn it on and adjust the temperature, use when the temperature reach what you want 4: during use, one hand pulls hair end and comb with straighter 5: if you want straight hair last longer, please use hair styling lotion and softener lotion and wash clean before hair straightening 6: it should not clip too much hair, if you want to clip more, please slow down the speed in the process of drawing 7: this product will be turned off by an hour automatically, turn it on if want to use again.