To change the barrel: Insert, remove and/or change the barrel head only when cooled. Insert barrel head into the base, as far as it will go. Lock the barrel onto the base by turning the retaining ring clockwise until the barrel is firmly fixed. To unlock the barrel from the base, turn the retaining ring counterclockwise and remove the barrel.
To turn curler on/off: hold down the on/off button.
To curl: simply wrap hair around the barrel, hold for 10 to 15 seconds, and release.