The Dahua DH-IPC-HFW3849T1-AS-PV-ANZ-S2 is a powerful 8MP fixed-lens bullet camera designed for high-end surveillance applications. Equipped with advanced Smart Dual Light technology, active deterrence features (red/blue lights and customizable sirens), and cutting-edge AI capabilities, this camera ensures round-the-clock security. Its 4K UHD resolution delivers crystal-clear detail, while AI-powered detection minimizes false alarms by distinguishing humans and vehicles from irrelevant motion.
Key Features
- 8MP 1/2.7" CMOS image sensor for crisp 4K resolution
- Up to 3840 × 2160 @ 25/30fps video output
- Fixed 2.8mm or 3.6mm lens with F1.0 aperture for low-light performance
- Smart Dual Light: Warm white light & IR with 30m illumination
- Active deterrence: Red/blue strobe light & customizable voice alerts
- Built-in dual microphones and speaker for two-way talk
- H.265/H.264 with AI Smart Codec for bandwidth-efficient recording
- SMD 4.0 and Perimeter Protection with accurate human/vehicle detection
- One-tap arming/disarming via app
- IP67-rated metal and plastic casing for harsh weather environments
- Supports MicroSD up to 512GB, PoE, and 12VDC
Expanded Feature Explanations:
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Smart Dual Light Technology: This advanced system switches between IR and white light based on detected activity. It maintains discreet monitoring using IR, then activates the warm white light when humans or vehicles are detected—capturing critical events in full color without continuous light pollution.
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SMD 4.0 (Smart Motion Detection): Enhances motion detection using AI to accurately classify objects, reducing false alarms from animals, leaves, or rain. It works in tandem with AI NVRs to support Quick Pick for rapid event review.
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AcuPick Technology: Enables quick, AI-based searches of recorded footage by selecting human or vehicle targets, even from massive video libraries.
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Active Deterrence: Uses flashing red/blue lights and a built-in speaker to alert intruders. Custom voice messages can be uploaded for enhanced security presence.
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Two-Way Audio: Full duplex audio system with dual mics and speaker allows real-time communication with visitors or intruders from your phone or NVR.
Perfect For:
- Residential perimeter and driveway monitoring
- Small business storefront or loading dock deterrence
- Office entrances, gates, and parking areas
- Warehouse or logistics yard surveillance
- Public-facing retail or commercial spaces requiring 24/7 clarity and active response
Installer Tips
- Ideal for installation at heights of 8–12 feet for optimal wide-angle coverage.
- Use PoE switches for easier power management and single-cable installs.
- For entry points, set SMD zones to exclude busy sidewalks or roads to reduce false triggers.
- Use the one-tap arming/disarming feature via DMSS app for easy user control.
- For nighttime scenes with color, enable Smart Dual Light to auto-switch from IR to white light on detection.
Downloads
Quick-Read Specs
| Specification |
Details |
| Image Sensor |
1/2.7" CMOS, 8MP |
| Max. Resolution |
3840 × 2160 (4K UHD) |
| Lens Options |
2.8mm (H: 106°), 3.6mm (H: 85°) |
| IR & White Light Range |
30m (98.4 ft) |
| Min. Illumination |
0.004 lux (Color), 0 lux with IR |
| WDR |
120 dB True WDR |
| Audio |
Dual MIC, 1-ch speaker, 2-way talk |
| Alarm I/O |
1 input, 1 output |
| SD Card Support |
Up to 512 GB MicroSD |
| Power |
12VDC / PoE (802.3af) |
| Power Consumption |
Max 9.4W (PoE) |
| Weather Rating |
IP67 |
| AI Features |
SMD 4.0, Perimeter Protection, AcuPick |
| Dimensions |
288.4mm × 94.4mm × 84.7mm |
| Weight |
1.0 kg (Net), 1.23 kg (Gross) |
| Color |
Black |
What is TIOC?
TiOC stands for Three-in-One Camera, combining Full-Colour Video, Active Deterrence, and AI Detection into one powerful security solution.
With TiOC cameras, you get:
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Full-Colour Footage 24/7 – even at night, thanks to Smart Dual Illuminators.
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Smart AI Detection – accurately identifies humans and vehicles, filtering out false
alarms caused by animals, trees, or shadows.
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Active Deterrence – red and blue warning lights plus a loud siren to stop intruders in their tracks.
These features work together to give you fast, accurate alerts and clear footage any time of day.
How Does It Work?
1. Full-Colour Night Vision with Smart Dual Illuminators
TiOC cameras automatically switch between infrared and LED lighting. When no threat is detected, they use discreet IR. When a person or vehicle enters the scene, the LED lights activate to record in full colour—helping you capture every detail clearly.
2. AI-Powered Detection
Using SMD 4.0 (Smart Motion Detection) and Perimeter Protection, the camera can tell the difference between a person, vehicle, animal, or object. This means:
- You get alerts only when it matters.
- False alarms are reduced to less than 1%.
3. Active Deterrence
When a genuine threat is detected, the camera activates built-in red and blue strobe lights along with a loud audible siren to immediately deter intruders. This proactive response helps prevent incidents before they occur. Users can schedule deterrence features to operate during specific hours—such as overnight—or customise them to suit their needs. For added convenience, a one-touch disarm function allows quick cancellation of the siren when necessary.
Extra Info
Smart Dual Illumination
This feature intelligently balances visibility with discretion. At night, the camera defaults to IR mode to minimize light pollution. But when motion is detected, the white LED activates to capture full-color footage — which is critical for identifying faces, clothing, or vehicle color. Once the scene is clear, it switches back to IR. This not only saves power but reduces unnecessary nighttime lighting that could bother neighbors or tenants. Ideal for residential zones or quiet commercial areas where constant white light is not desirable.
SMD 4.0 (Smart Motion Detection)
Unlike basic motion detection that triggers for any movement, SMD 4.0 uses advanced AI to filter out irrelevant motion like animals, shadows, or moving trees. It specifically identifies human and vehicle shapes, reducing false alarms and saving storage. This is especially useful in environments with heavy foliage, pets, or changing lighting conditions. The accuracy of alerts also helps reduce notification fatigue on mobile apps.
AcuPick Search Technology
Searching through hours of recorded footage is time-consuming. AcuPick allows users to select a person or vehicle in one camera view and instantly locate all appearances across compatible NVR footage. It dramatically cuts investigation time, especially in large-scale surveillance setups. This feature is ideal for retail, school campuses, or any scenario where tracking movement across time and location is important.
AI SSA (Scene Self-Adaption)
Lighting conditions vary throughout the day and from scene to scene — from shadows on a driveway to direct sunlight on a storefront. AI SSA automatically adjusts key image parameters like contrast, white balance, and exposure in real time to maintain image clarity. This reduces the need for manual configuration and ensures better video evidence during critical moments, regardless of changing conditions.
Active Deterrence (Red/Blue Lights + Siren)
This camera doesn’t just record — it intervenes. When an intruder triggers your set perimeter rule (like a tripwire or intrusion zone), the camera flashes red and blue lights and plays a loud audible warning. This can prevent crimes before they happen, especially in unsecured outdoor areas. You can upload your own voice warning (e.g., “This area is under video surveillance”) or choose from pre-recorded ones. It’s especially useful in remote areas, construction sites, and after-hours business entrances.
WizSense AI Platform
WizSense is Dahua’s AI suite designed for small to medium-sized systems. It provides professional-grade AI features like human/vehicle detection, AcuPick, and SMD without requiring enterprise-level hardware. This makes high-performance AI surveillance more accessible and affordable for SMBs, residential users, and integrators seeking value without sacrificing quality.
Local + Remote Storage Options
You can record footage directly to a microSD card (up to 512GB), send files to NAS or FTP, or use a network video recorder (NVR). This flexibility allows for both standalone and system-based setups. Local SD storage is ideal for backup in case of network failure, while NAS or NVR offers larger capacity and central access. Smart H.265+ encoding significantly reduces file sizes without sacrificing image quality.
Integration and App Control
Fully compatible with Dahua’s mobile app (DMSS), desktop clients (SmartPSS Lite), and back-end systems (DSS), this camera also supports ONVIF for use with third-party VMS or NVRs. Via the app, users can arm/disarm alarms with one tap, receive push notifications, speak through the camera, or playback footage. Setup is straightforward, even for non-technical users, especially with QR code scanning and remote live view.
Cybersecurity Protections
Dahua builds in strong cybersecurity protections including encrypted video streams, secure firmware updates, and access controls. This guards against data breaches or unauthorized remote access — a key consideration for business and home networks alike.
More About AcuPick - Smart Video Search with Precision AI
Dahua’s AcuPick technology revolutionises video surveillance by using advanced AI to pinpoint people or vehicles across recorded footage with remarkable speed and accuracy. Instead of scrubbing through hours of video manually, AcuPick enables users to filter footage by specific targets, drastically cutting down search times and boosting operational efficiency. Integrated into a range of Dahua cameras (including TiOC series) and compatible NVRs, AcuPick delivers a seamless and intelligent search experience.
Highlights of AcuPick:
AI-Driven Precision:
AcuPick leverages intelligent algorithms to differentiate between human and vehicle activity, refining search results to what truly matters.
Smart Filtering:
Search footage using key attributes like clothing colour or vehicle type—no need to know the exact time an incident occurred.
Instant Video Recall:
With just a few clicks, users can zero in on critical moments, improving response times and streamlining investigations.
False Alarm Reduction:
By filtering out irrelevant motion, AcuPick helps reduce nuisance alerts, leading to more reliable monitoring.
Flexible Deployment:
Whether through Dahua's smart cameras or NVR integration, AcuPick fits into a wide range of security setups.
Practical Applications:
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Retail & Offices: Track customer flow or monitor for unauthorized access.
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Car Parks & Garages: Instantly retrieve footage of accidents or suspicious activity.
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Public Spaces: Quickly find persons of interest using visual identifiers.
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Residential Estates: Enhance safety by identifying vehicle movements or visitors.
AcuPick transforms surveillance from reactive monitoring to proactive intelligence, saving time while elevating security across the board.
Q&A
Q: Can this camera work in complete darkness?
A: Yes, it features both IR and white light illumination, allowing up to 30m night vision with full-color recording when motion is detected.
Q: Is it compatible with third-party NVRs?
A: Yes, it supports ONVIF Profiles S/G/T for broad NVR compatibility.
Q: Can I disable the red/blue flashing lights?
A: Yes, both lights and voice alarms are fully customizable and can be scheduled or turned off entirely via the app or NVR.
Q: What is the maximum SD card size?
A: The camera supports up to a 512 GB MicroSD card for local recording.
Q: Is the black color just cosmetic or functional?
A: The black finish provides better visual stealth in darker environments, making it less noticeable while maintaining all features.
Comparison Table
Dahua IPC-HFW3849T1-AS-PV-ANZ-S1 vs. IPC-HFW3849T1-AS-PV-ANZ-S2
| Category |
IPC-HFW3849T1-AS-PV-ANZ (S1) |
IPC-HFW3849T1-AS-PV-ANZ-S2 |
| Image Sensor |
1/2.8" CMOS |
1/2.7" CMOS |
| ROM |
128 MB |
256 MB |
| RAM |
512 MB |
2 GB |
| Min. Illumination (B/W) |
0.0004 lux@F1.0 (B/W, 30 IRE) |
0.0004 lux@F1.0 (B/W, 30 IRE) |
| Illuminator Number |
2 (IR LED); 2 (warm light) |
2 (IR LED); 2 (Warm light) |
| Field of View (3.6mm lens) |
H: 85°; V: 45°; D: 100° |
H: 85°; V: 45°; D: 102° (Slightly wider diagonal) |
| Close Focus Distance (2.8mm) |
2.0 m (6.56 ft) |
1.5 m (4.92 ft) |
| Close Focus Distance (3.6mm) |
2.8 m (6.23 ft) |
2.2 m (7.22 ft) |
| DORI Distance (3.6mm Identify) |
7.8 m (25.59 ft) (Varies slightly by source, but largely similar) |
7.8 m (25.59 ft) |
| Micro SD Card Support |
Up to 256 GB |
Up to 512 GB |
| AI Features |
SMD 4.0, Perimeter Protection (Intrusion, Tripwire), Smart Search |
Same features, with AcuPick and AI SSA explicitly listed as supported functions. |
| AI Coding |
Not explicitly detailed as AI H.265/H.264 compression rate |
AI H.265 (Compression rate ≥25%), AI H.264 (Compression rate ≥25%) |
| Privacy Masking |
8 areas (Varies by source, some say 4) |
4 areas |
| Power Consumption (Max PoE) |
9.4 W (H.265+WDR+ warm light+siren and light active deterrence + intelligence on) |
9.4 W (H.265+WDR+ warm light+siren and light active deterrence + intelligence on) |
Summary Recommendation
Choose the S2 model (IPC-HFW3849T1-AS-PV-ANZ-S2) if you need:
- Increased RAM and ROM for potentially smoother operation and future-proofing.
- Larger Micro SD card capacity (512 GB vs 256 GB).
- Explicitly stated support for AcuPick and AI SSA for more advanced AI functionality and scene adaptation.
- Improved close focus distance on both focal lengths.
Choose the S1 model (IPC-HFW3849T1-AS-PV-ANZ) if you need:
- A cost-effective solution with similar core 8MP resolution and Smart Dual Light/Active Deterrence features.
- Slightly larger image sensor (1/2.8" vs 1/2.7" - though the impact on image quality might be minimal given other advancements in S2).
