Nano-silver technology purifies and protects hair for a silky, shiny, healthy finish. Nano-sized particles sanitize and reduce friction for gentle styling Tourmaline and ceramic, natural sources of negative ions and far infrared heat, eliminate frizz and seal in moisture, leaving hair smooth and shiny The Advanced Ceramic Heater (MCH) provides quick heat up and stable temperatures Surround heat offers endless styling options; create shiny curls, waves or straight hair Korean floating plates provide perfect tension for gripping the hair Safety and energy-efficient feature the iron auto shuts-off after 60 minutes of inactivity Heats up to 446°C (230° F) Replaces the popular A-ST2