YiShi Electronic Technology Development Co., Ltd is a high technology company in security area.It has branch company in Taiwan and modern SMT plant in Mainland China, which has obtained ISO9001 and 2000 certification,so as to provide sufficient insurance of products quality and meet your demand for higher quality and lower price. The company specialize in manufacturing and marketing security and safety products, including all kinds of DVR cards,cameras and standalone dvr.Dvr cards include kodicom series,GV series,Avermedia series,picaso series,pico series, WDT series;Cameras include color camera,B/W camera,dome camera,bullet camera,integrative camera,flying disk camera,and double ccd camera.In addition we have developed a new product, telephone recording card/box,this is a new product in surveillance product area, it is developed by our own engineer.