Shenzhen YYR Technology Co., Ltd. located in Shenzhen,China,sets research, manufacture and sale as a whole .OEM is welcomed.Our brand name is YYR.We are the expert of derma roller,derma pen,LED face mask and hair regrowth helmet etc.Our products are popular in every country from all over the world.We attach much importance to the quality of our products, service and delivery speed.We have a high-qualified sale team, which can serve you in time and considerately.It is our honor to cooperate with you.