Color:Blue Guideline Use different temperature settings to make your hair straight. This hair straightener has 10 rates to adjust temperature. Each rate can change 5 degrees Celsius. We recommend that you choose the highest rate at the beginning, then according to your hair texture to reduce the temperature level. 1. Choose temperature in 210-230 degrees Celsius for thick hair. 2. Choose temperature in 190-210 degrees Celsius for medium hair. 3. Choose temperature in 170-190 degrees Celsius for fine hair. If you set low temperature perm, molding may be a little slowly. Please press on-off key and hold for 3 seconds to turn it on, and press on-off key and hold for 3 seconds to turn it off. Instructions 1. Please keep hair dry and neatly groom before using. 2. Insert the plug into proper socket. 3. Turn it on and adjust the temperature to your desired level. 4. If you want to keep straight hair lasting longer, please use hair styling lotion and softener lotion and wash clean before hair straightening. 5. Please do not clip too much hair. If you want to clip more hair, you should slow down the speed when combing. 6. It will turn off in an hour automatically. Turn it on when you use again.