Webfind helpful customer reviews and review ratings for hot tools htdr5589f pro signature™ one step volumizer and blowout, hair dryer, detachable, travel friendly,. Webfeb 21, 2022 · techradar verdict. Hot tools pro signature digital straightener is a lightweight hair styler that’s simple to use. Its rubberized finish makes the straightener. Steam gently surrounds strands and evenly heats hair to lock in styles.