This likely refers to the adjustable heat settings or temperature levels on the curling roller. Having multiple heat settings allows you to customize the curling process based on your hair type and the desired style.
The "3 tubes spiral rotating" feature suggests that the curling roller has three separate barrels or tubes arranged in a spiral pattern. This design can create spiral or wavy curls in your hair.
High-quality curling rollers often incorporate ceramic or tourmaline technology in their barrels. These materials help distribute heat evenly, reduce frizz, and protect the hair from excessive heat damage.
Ensure the curling roller has safety features such as an automatic shut-off function to prevent overheating and potential accidents.
A cool tip at the end of the roller is a convenient feature that allows you to hold the tool without burning your fingers while styling.