Peninsula brand’s hair growth caps are pretty good. They are a big manufacturer and a big brand. I learned from Baidu that their hair growth caps have obtained CFDA certification, and they have also obtained FDA and CE certifications. It is the mark that Peninsula Hair Growth Device can be sold in the United States and the European Union. The laser treatment method it uses has been used in the United States and Europe for more than ten years. The technology is very mature, and many patients have achieved remarkable results.