Devance Technology Co., Ltd was founded in 2005 , we are a professional manufacturer who produce any kinds of consuming electronics (stereo earphones and headsets, USB flash drives, Portable power source and some accesories for fashion customer electronic products). Our factory locates at o Shenzhen of Guangdong, China. Our factory covers an area of 1, 600 square meters and has a strong production line with more than 120 employees. we have abundant experiences in ODM and OEM operation.We will have your own design become true. Our products have wide sales network in America, Europe, and Asia. our mission is always to give excellent services to put our customers first, and do right things while do things right. Kingmass may not be the largest supplier, but our friendly staff strives to be the best. We earn customers by offering topping services and innovative solutions. For us, to satisfy our customer is more important than anything eles