Shenzhen Zhengtang Technology Co.was established in 2002. Which is a professional manufacture of speaker,earphone,headphone and other electronic products in Shenzhen,China.Our sales team always insist in providing the best service with our customers,and pay special attention on quality and delivery on time.To control the quality, our professional QC team will follow up the whole production process and strictly inspect the goods according to the standard of ISO. Our company founded designer team and focus on developing new products. We often develop new items every year to meet changing requirement of customers and we will apply patents for good selling products.Our goal is to be trust supplier for the professional speaker,earphone Products Supplier. we are so confident that our products will help you occupy the big market.Welcome you to build the long-term co-operation with us.