Hot Tools professional Marcel Iron provides conventional curling iron performance with 85 watts of power providing four times the power of standard curling irons for incredibly fast action. Electronics sensor in iron's barrel detects heat loss and signals heating system to boost iron's heat. Constant heat - Barrel temperature remains constant curl after curl, allowing stylist to work quickly while attaining consistent results. Ready to use in 60 seconds. And the iron continues to build heat even if it is used before selected temperature is reached. 10 variable heat settings - Built-in rheostat control provides 10 settings from low, for fine or chemically treated hair, to high for thick, coarse hair. Superior mica heating system - Mica heater covers entire inner surface of barrel to distribute heat faster and more evenly than conventional irons.