ShenZhen ChengYu Technology Development Co.,Ltd. is a high-tech enterprise dedicated to R&D of digital video recording (DVR) products and CCTV cameras, Now it becomes the leading manufacturer and supplier of DVR products and CCTV cameras in China under the support and trust from its clients and also becomes one of the rare DVR and CCTV cameras manufacturers in world to R&D DVR products independently.The products are including stand-alone DVRs, DVR cards, CCTV cameras and accessories. DVR cards are including kodicom card, geovision card, avermedia card, PICO 2000,WDT series; CCTV Cameras are including All-In-One cameras, day / night cameras, dome cameras, CCD board cameras, wireless AV camera, flying disk camera etc.