Shenzhen Dongjia Digital Technology Co., Ltd. is a hi-tech enterprise which is specialized in developing, manufacturing and marketing of CCTV and IP systems in Mainland China. Our main products include Megapixel IP cameras, NVR, digital CCTV cameras and related surveillance products. Our qualified and professional R&D team is well-experienced in the field of video and audio surveillance systems. Strong research and development ability makes us walk at the head of the security field. We have ...