Cordless & Portable DesignThe hair straightening brush is designed for ease of use and portability. This means you can use it anywhere without having to worry about finding an outlet or dealing with tangled cords.30 Seconds Fast Heating & StraighteningThe hair straightening brush adopts MCH heating technology, a professional way to provide fast heating and particularly even heat distribution, which heats up to 450F in just 30 seconds and easily turns curly hair into straight hair in minutes, meeting your quick styling needs for any occasion.Negative Ion Hair Straightener, Suitable for a Variety of HairThe hair straightening brush releases 50,00,000 negative ions when heated, which can easily enter the gaps of the hair core, repairing the hair from the inside out, giving your hair a healthy shine without frizz.USB Charging & Long Working TimeEquipped with a 4,000 mAh high-capacity battery, it can be used for up to 40 minutes at a time at the highest temperature setting, giving you enough time to get silky smooth results. You can visually see the progress of the temperature rise and the remaining battery life. Press the switch button once to switch the temperature and battery.Safety Anti-scalding and Anti-accidentThis cordless hair straightener brush is designed with safety in mind to prevent accidents. First, we added a protective device on the surface of the heating plate to prevent skin burns during use. At the same time, we set a 15-minute automatic shutdown function to prevent accidents. Fully ensure the safety of your use.