Conventional curling iron performance cannot meet the professional stylist's needs. In the demanding salon environment, a curling iron must have the ability to heat up fast, avoid heat loss so the stylist may work quickly while achieving consistent curl quality, and variable heat with a full range of temperatures, from extra high setting for coarse, or ethnic hair to a low setting for fine, damaged or treated hair. These demanding requirements led to Hot Tools' innovative, and very effective, combination of high power and electronics, Pulse Auto Heat Control. Hot Tools' Patented Pulse Auto Heat Control senses heat loss and regenerates heat instantly for nonstop curling with consistent quality. Barrel temperature remains constant curl after curl.