This salon-caliber hot brush has a variety of advanced features for superior results. Designed with Multi-Layer Technology, the barrel distributes heat evenly for beautiful curls that last. Smart Technology® keeps barrel heat stabilized to eliminate hot spots, Turbo Heat® delivers an extra 36 degrees F burst of heat for fast results, and 25 heat settings include the right one for any hair type. This barrel size is too big for my short hair. It's a beautiful curling iron though and I will get a smaller one.