Argus Inc. is a technology-oriented company developing safety and security related products including high performance Digital Video Recorder based on our many years of experiences in image recognition and image processing industry. All of our engineers have more than 10 years of experience in the field of developing CCD camera, CMOS camera, Quad, Multiplexer, and Digital Video Recorder. Digital Video Multiplex Recorder we developed excluded PC hardware & OS to secure stability and reliability while operation, and we are sure it is the right model to record both on quad mode (each image at 360x120 resolution) or on field switcher mode (each image at 720x240 resolution).   We have 4 models. 4ch simplex, 4ch Duplex(semi), 8ch simplex, 16ch simplex at the moment.