Dongguan Yansen Electronic Technology Co., Ltd. was established in September 2001, we are a well-known manufacturer of Bluetooth audio products such as Stylus Pen,Bluetooth headsets, Battery and so on.About us:1. Professional Bluetooth audio products manufacturer:We have our own R&D team and we have much experience in working out customers' concerns.2. Quality Control We have professional inspectors and all products will be tested strictly before delivery, and will provide inspection reports to customers if need. 3. Excellent After-Sales Service Each question and inquiry will be responded within 24 hours. We promise 13 months warranty for every order.If you are looking for a reliable partner, welcome to contact us for cooperation.