Hair Care: The ionic hair straightening comb releases rich negative ions to help increase hair hydration, eliminate frizz, tangles and split ends, leaving your hair smooth, silky, naturally shiny and manageable. Heating Faster: The ceramic/beard straightening brush heats up quickly within 30-40 seconds, the electric heating brush can adjust the heating temperature from 150 C (300 F) to 230 C (450 F), displayed on the LED display, different Temperature settings will meet your needs for various hairstyles. Automatic Temperature Lock: The ceramic hair straightener with temperature lock function can prevent hair from being damaged due to temperature rise while styling. EASY TO USE: The hair straightening brush is suitable for all hair types and lengths, allowing you to easily turn curly hair into straight hair at home. 10V-240V dual voltage hair straightening brush, small hair straightening comb, suitable for business travel, perfect gift for family and friends, best choice for men's beard trimming.