DHI-NVR4216-EI is a 16-channel network video recorder from Dahua’s WizSense series, built for surveillance projects that need both onboard AI intelligence and expanded storage capacity. With two HDD bays and rich alarm connectivity packed into a 1U enclosure, this recorder suits businesses that need longer retention periods alongside facial recognition and behavior analytics.

The DHI-NVR4216-EI supports IP camera resolutions up to 16MP, with adaptive decoding capability reaching up to 16 channels at 1080p@30fps. Network bandwidth totals 256 Mbps for incoming, recording, and outgoing streams with AI disabled, or 180 Mbps across the board when AI features are active, giving plenty of headroom for a fully loaded 16-camera system.

The standout feature of the DHI-NVR4216-EI is its onboard AI processing. The recorder itself handles 1-channel face detection and recognition, storing up to 10 face databases with 20,000 face images (2.5GB total capacity), along with 2-channel perimeter protection supporting 10 IVS rules per channel, and 4-channel SMD Plus for accurate motion filtering. When paired with compatible Dahua AI cameras, capabilities extend to face detection, face recognition, perimeter protection, SMD, ANPR, people counting, stereo analysis, and heat mapping across all connected channels, each processing up to 8 targets per second.

Face attribute recognition covers gender, age group, glasses, expressions, face masks, and beards, and each stored face profile can include name, gender, birthday, address, and credential details, making the DHI-NVR4216-EI well suited for access control, retail analytics, and identity-aware security at scale.

What sets the DHI-NVR4216-EI apart from single-bay models is its dual SATA HDD interface, supporting up to 20TB per drive with disk group functionality for organizing storage by camera or channel. It also adds 4-channel alarm input and 2-channel alarm output, giving integrators more flexibility for connecting external sensors and triggering physical alarm devices.

Video compression relies on Smart H.265+, H.265, Smart H.264+, H.264, and MJPEG. Video output includes simultaneous or heterogeneous HDMI and VGA up to 4K (3840×2160) resolution, and the network port runs on Gigabit Ethernet (10/100/1000 Mbps) to support the higher throughput this configuration demands. Camera compatibility extends beyond ONVIF to include native support for Panasonic, Sony, Hanwha, Axis, Pelco, Arecont, and Canon devices.

Weighing 1.51kg and rated for -10°C to +55°C operation, the DHI-NVR4216-EI is a strong fit for schools, retail chains, hotels, and office buildings that need facial recognition, extended storage, and richer alarm integration across a full 16-camera surveillance system.