Dear Sir, This is a professional manufacturer of car audio and video in Shenzhen, China. It has about 450 employees and 40 engineers. It occupies more than 6700 kms, with an acreage of 11,000 kms.The corporation owns 7 product lines, 2 high-speed anto-SMT Product lines.It has the capability of production 6 billion auto sounds. The corporation has a laboratory, which can simulate the circumstances auto sounds work. Besides, the lab can also do the longevity testing. The corporation can do kinds of testings, such as high temperature preservation, low temperature preservation, high temperature and high humidity preservation, high-low temperature impact, high temperature action, low temperature action, falling impaction, longevity, anti-jamming. The corporation fetches in more than 30 advanced testing instruments overseas, which makes the qualities and consistencies of the production better. Its products mainly contain kinds of car CD, DVD, cassette player. Many of the products are passed the FDA, FCC, CE certification.