Sumlife flat iron use the advanced PTC ceramic heater and far-infrared technology can release negative ions to moisten your hair and transform frizzy, dull hair into gorgeous shiny and sleek looking Adjustable temperature 265℉~450℉: 265℉-330℉ suit for fragile hair, 330℉-390℉ for damaged hair, 390℉-450℉ perfect for healthy hair type. It will leave your hair looking polished and healthy after you find the proper heat setting for your hair Dual Voltage Hair Straightener for Travel: 100V-240V worldwide used for international travel, safe handle lock, auto shut-off after 1 hour, storage bag pouch included 3D Floating Plate: the plate is adjustable, never pull your hair. the 1 inch plate width wide enough for any hair length LCD Digital Display: with a LCD display inside the straightener, you can easily see the real-time temperature when straightening your hair.