Founded in 2009, Shenzhen Yiant Security Equipment Co., Ltd. is a subsidiary company of Shenzhen Eternal Asia, which is the first listed supply chain enterprise in China. We specialize in developing and manufacturing a wide range of security, intercom and intelligent surveillance systems. With our experienced R&D team, we have developed our latest video door phone combo with four-channel TFT DVRs. In addition to video door phone functions, it can connect to four cameras, and has built-in ...