The Dahua 4-Door Access Controller (ASC1204C) is a professional surveillance camera from Dahua Technology — the world's second-largest security manufacturer — engineered for reliable, detailed video capture in both indoor and outdoor environments across a wide range of lighting conditions. 4-door TCP/IP access controller, RS-485, Wiegand, 100K card capacity. Its H.265+ compression codec dramatically reduces file sizes and network bandwidth compared to H.264, enabling more cameras to be recorded on the same NVR and storage system. Compatible with Dahua NVRs, DSS/CSS centre management software, and the Dahua DMSS mobile app for remote live view and playback, it provides a complete end-to-end surveillance ecosystem from a single manufacturer.