Shenzhen Chengyu Technology Development Co., Ltd. is a high-tech enterprise dedicated to the R&D of digital video recording (DVR) products and CCTV cameras. Now we have become one of the leading manufacturers and suppliers of DVR products and CCTV cameras in China thanks to the support and trust of our clients. We are also one of the few DVR and CCTV cameras manufacturers in the world to R&D DVR products independently. Our products include stand-alone DVRs, DVR cards, CCTV cameras and accessories. Our DVR cards include Kodicom cards, Avermedia cards, PICO2000, and the WDT series. Our CCTV cameras include All-In-One cameras, day / night cameras, dome cameras, CCD board cameras, wireless AV cameras, and flying disk cameras.