1Negative Ion Hair Care: This USB hair straightening comb uses nanometer magnetic energy double moisturizing technology, double moisturizing care. Longer term use helps to improve the quality of hair. 2Rapid Heating: This USB hair straightening comb can do 30 seconds rapid heating, intelligent NTC temperature control. 3Usage Scenario: With our portable USB hair straightening comb, you won't have to worry about messy hair when you are working, no more worrying about loose hair when you are traveling, and you can use it when you are taking care of your hair at home. 4Stylish Appearance: Our portable USB hair straightening comb has a stylish appearance to keep you in a good mood while using it. 5Alloy Material: The portable hair straightening comb is made of alloy material, which is stable, resistant to fall and wear, and can be used sturdily.