Shenzhen Langyin electronic Co., LTD. is founded in Feb.2006,Langyin owns a standard factory in Bao'an, Shenzhen, with an area more than 1500 square meters. more than 100 employees, including 3 engineers with over 8 years' R&D experience .What's more, We have developed a complete system including mould design, PCB layout, package design, technical support, and after sales service. At present the product involves to MP3 sunglasses,bluetooth sunglasses,FM sunglasses,recorder and video digital ...