Cordless Hair Straightener Brush: Its compact and lightweight design makes it easy to bring on the go, Small size, light weight, easy to carry around the world. USB Type-C charging & Long endurance: This straightening brush features a 4500mAh large-capacity rechargeable battery, With just one charge, you can use it for up to 45 minutes, that can be conveniently charged using the included USB Type-C cable Quick heating&intelligent constant temperature: This Cordless Hair Straightener Brush uses MCH heating technology,This latest heating technology can quickly heat up to the preset temperature，Equipped with an intelligent constant temperature movement, it can maintain a constant temperature and heat evenly to each comb tooth of the comb Negative ion hair care: This straightener brush releases 30 million negative ions during the straightening process, reducing static and frizz in your hair.