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Dahua DHI-NVR4116HS-4KS3 is a compact 1U Lite network video recorder for 16 IP cameras. It supports 4K HDMI output up to 3840×2160 and records IP cameras up to 12MP. With Smart H.265+/H.265/H.264+ compression, 1 SATA hard drive up to 20TB, and ONVIF support for third-party brands, it is suitable for home, shop, office, warehouse and small commercial CCTV projects. The recorder-side SMD Plus filters humans and vehicles on 4 channels to reduce false alarms from rain, leaves and light changes. When AI cameras are connected, it also enables face detection/recognition, perimeter protection, people counting, stereo analysis and heat map through the camera channels. - Key Highlights ✔ 16 IP channels, records up to 12MP cameras; resolutions include 12MP/8MP/6MP/5MP/4MP/1080p and below. ✔ 4K video output: HDMI up to 3840×2160, VGA up to 1920×1080; simultaneous or split display supported. ✔ Bandwidth: AI off 160Mbps incoming/160Mbps recording/80Mbps outgoing; AI on 80/80/60Mbps for stable multi-camera load. ✔ Decoding: AI off up to 8×1080p@30fps or 2×8MP@30fps; AI on up to 7×1080p@30fps or 1×12MP@30fps. ✔ Recorder AI: 4-channel SMD Plus for human/vehicle secondary filtering and fewer false alerts. ✔ Camera AI: up to 6 channels face detection, 6-channel face recognition, 6-channel perimeter protection, 6-channel SMD Plus, plus people counting, stereo analysis and heat map depending on connected cameras. ✔ Storage: 1 SATA HDD up to 20TB per spec, Smart H.265+/H.264+ to save disk and bandwidth; USB and network backup. ✔ Compatibility: ONVIF Profile T/S/G, CGI, SDK; works with Panasonic, Sony, Axis, Arecont, Pelco, Canon, Hanwha and other ONVIF IP cameras. ✔ Ports and build: 1×GbE LAN, 1 HDMI, 1 VGA, 1 RCA audio in, 1 RCA audio out, 2×USB 2.0; 12VDC 2A, <10W without HDD.