Dongguan Yirui Technology Co., Ltd. is a research and development, design, production and sales in one company. The company's main products are Bluetooth speaker, Bluetooth headset, Bluetooth adapter, car Bluetooth adapter, multi-functional Bluetooth promotional gifts, etc. The factory is divided into five departments: product R & D and design department, mold manufacturing department, injection molding department, SMD department, assembly department and sales department. Product R & D ...