Shenzhen Geshi Electronic Technology CO.,LTD is a professional high technology corporation, which develops, produce and sells Car AV systerm.There are more than 100 employees and 20 engineers. The corporation owns 5 production lines,It can production 300 thousand car AV player per year. 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...