Description

Dahua DHI-NVR2104HS-P-I2 – 4 Channel WizSense Network Video Recorder

Small surveillance systems deserve intelligent recording capabilities without the complexity of enterprise-grade equipment. The Dahua DHI-NVR2104HS-P-I2 is a 4-channel WizSense NVR with integrated PoE ports and AI-powered analytics including face detection, face recognition, perimeter protection, and SMD Plus. Designed for homes, small retail, and small to medium businesses, this compact recorder delivers intelligent video management with simplified installation.

4 Channels with Integrated PoE

Four built-in PoE ports provide power and data connectivity to IP cameras through single Ethernet cables, eliminating the need for separate power supplies at each camera location. Total PoE output of 38W with up to 25.5W per port supports most IP cameras including those with IR illumination and motorised lenses. Simply connect cameras to the NVR and power is delivered automatically.

AI-Powered Analytics

WizSense deep learning algorithms enable intelligent video analysis directly on the NVR, adding AI capabilities to cameras that lack built-in analytics. The recorder supports 1-channel face detection/recognition, 1-channel perimeter protection, and 4-channel SMD Plus when processing AI on the device. Cameras with built-in AI can also pass their analytics to the NVR for unified management.

Face Detection and Recognition

Face detection identifies human faces in video streams, tracking and capturing optimised face snapshots for storage and comparison. Face recognition compares captured faces against databases of up to 10 groups containing 5,000 images total. Six facial attributes are analysed including gender, age group, glasses, expressions, face masks, and beards.

Perimeter Protection

Deep learning algorithms power tripwire and intrusion detection with automatic filtering of false alarms from animals, leaves, lighting changes, and other non-target movement. Secondary recognition improves accuracy, ensuring alerts focus on genuine security events requiring attention.

SMD Plus Smart Motion Detection

All four channels support SMD Plus, which classifies humans and vehicles while filtering false alarms from irrelevant movement. This intelligent motion detection dramatically reduces unnecessary notifications compared to basic pixel-change detection, directing attention toward genuine security events.

AI Search

Search recorded footage by target metadata or upload face images to find matching appearances across multiple channels and extended time periods. This capability transforms hours of manual review into quick, targeted searches that efficiently locate when and where persons of interest appeared.

High-Resolution Support

The recorder handles cameras up to 12MP resolution with 80 Mbps bandwidth for access and storage. Decoding capability reaches 6 x 1080p at 30 fps with AI disabled or 4 x 1080p at 30 fps with AI enabled, providing flexibility to balance resolution, channel count, and intelligent features.

Efficient Storage

One SATA bay accepts hard drives up to 10TB capacity. Smart H.265+ compression reduces storage requirements by up to 70% compared to standard encoding while maintaining image quality, extending recording retention significantly without additional drives.

Dual Video Output

Simultaneous HDMI (up to 4K) and VGA outputs enable connection to monitors of different types. Multi-screen display supports 1 or 4-view layouts for live monitoring. The local GUI provides intuitive operation via mouse without requiring computer access.

Smart Cooling

An intelligent fan automatically adjusts speed based on CPU and ambient temperature, providing efficient cooling while minimising noise during normal operation. This extends component life while improving user experience in quiet environments.

Key Features

• 4 IP camera channels
• 4 integrated PoE ports (38W total, 25.5W per port max)
• 80 Mbps bandwidth
• Up to 12MP camera support
• 1-channel face detection/recognition (AI by NVR)
• 1-channel perimeter protection (AI by NVR)
• 4-channel SMD Plus
• Up to 10 face databases, 5,000 images
• AI search by metadata or face image
• Decoding: 6 x 1080p@30fps (AI off) / 4 x 1080p@30fps (AI on)
• Smart H.265+/H.265/Smart H.264+/H.264
• 1 SATA bay (up to 10TB)
• 1x HDMI (4K), 1x VGA (simultaneous)
• 1x audio input, 1x audio output
• 2x USB 2.0
• ONVIF compatible
• Smart fan cooling
• iOS and Android mobile access
• DMSS, DSS, Smart PSS Lite compatible

Specifications

Frequently Asked Questions

What is AI by NVR vs AI by camera?

AI by NVR means the recorder processes analytics for cameras without built-in AI. AI by camera means cameras with their own AI chips process analytics locally and pass results to the NVR for unified management.

How many cameras can use face recognition?

When using AI by NVR, 1 channel supports face detection/recognition at up to 12 face images per second for detection and 4 images per second for recognition. Cameras with built-in AI can add additional face recognition channels.

What is the maximum hard drive size?

The single SATA bay supports hard drives up to 10TB. HDD capacity may vary with operating environment temperature.

Can I view cameras on my phone?

Yes, the DMSS app for iOS and Android provides remote viewing, playback, and push notifications from anywhere with internet access.

Does AI affect recording performance?

Yes, enabling AI reduces decoding capability from 6 x 1080p to 4 x 1080p at 30fps. For systems prioritising higher resolution or more simultaneous streams, AI can be disabled on specific channels.