Plate & barrel are made of Create Ion® Gold to allow the flat iron to slide smoothly through hair. Create Ion® Silicone Rubbers are installed on the barrel, which provides a gentle grip to create shiny, bouncy curls.There are 5 Stage Temperature Indicator. Indicator lights illuminate when appliance is turned on or when the temperature setting is being adjusted.Temperature is adjustable by every 10℃ between 150℃ and 190℃. As an added safety feature, this appliance has a built in “Sleep Mode” function (one-hour off), which automatically turns the appliance off after one hour of use, from the time the appliance is switched “ON”.