Ionic Hair Straightening Brushes Black. Benefits: The Double Ionic Generator unleashes 10 millions of negative ions, coating your hair and giving you a silky & natural lustrous look while repairing dry & damaged hair over any split ends. A Wider Comb Pitch Design can greatly reduce the hair breakage and damage by reducing the excessive friction to your hair. Features: The 30s Faster MCH (Metal Ceramic Heating) is a professional way to provide quick heat and especially even heat distribution that easily turns curly hair into straight hair in just minutes. The heated brush provides a distinctive memory mode. When you use this straightener brush again, it will recover the previous heat setting. Key Notes: 16 Temperature Options For Different Hair Types (170-450). Fahrenheit/Centigrade Display Switch. 60 Mins Auto-off, 360 Swivel Power Cord. International Dual Voltage 110-240V.