?【Double Negative Hair Straightener 】:Ralthy 2 in 1 straightening brush emits rich negative ions help condition your hair and nourish damaged hair, reducing split ends and knotting, giving your hair a smooth, silky-looking natural and healthy hair.It not only a hair Straightener Brush suitable for women,but also a great beard straightener for men. ?【Fast Heating and 5 Level Temperature Control】Ralthy Beard and Hair Straightener Brush readies in 60s and can straighten more hair/beard at once thanks to wider and denser comb tooth also decrease the time of straightening.The heat brush straightener offer 5 adjustable heat settings from The adjustable heat temperature from 120°c (250°F) to 200°c (400°F) allows you to match your specific hair type: thin, fine, Wavy or curled. ?【Anti-Scalding Design & Safety Controls】:Ralthy portable electric straightening comb features protective guards around the bristles to reduce the chance of scorched or damaged hair. Auto temperature lock & auto-of safety feature, maintain constant temperature after reaching the set temperature, automatically shut-off if not used for 30 minutes to ensure you and your house’ safety.