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eufy Security PoE NVR CCTV System S4 Max Review: Is it the complete 24/7 surveillance solution?

eufy Security PoE NVR CCTV Camera Systems S4 Max, 16 MP Triple-Lens Bullet-PTZ Cam with 2TB Hard Drive, 360° PTZ, Smart Video Finder, Cross-Cam Tracking, Red & Blue Lights, 24/7 Recording, IP65
4.6
[16MP Triple-Lens Camera]  4K wide-angle plus 2K PTZ lenses with 8× auto-zoom and 360° pan for complete coverage.
[Dynamic Tracking & Auto-Framing]  Locks and auto-tracks subjects up to 50 meters, maintaining sharp, centered close-ups.
[Live Cross-Cam Handoff]  Cameras sync to continue tracking when one reaches limits, ensuring uninterrupted real-time coverage.
[On-Device AI Agent]  Local 8-core AI analyzes threats instantly, enables custom No-Go zones and precise alerts.
[Expandable, Plug-and-Play Storage]  8-channel scalable to 16, preinstalled 2TB HDD (upgradeable to 16TB) with single PoE cable setup.
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Home surveillance system designed for continuous, automated monitoring across large properties, promising comprehensive coverage and smart search. For homeowners and small businesses who want reliable evidence and fewer false alerts, confidence comes from local AI and cross-cam tracking. Is the eufy Security PoE NVR CCTV System S4 Max the right fit for your security needs?

⚡ At a Glance
  • Image Quality: 16 MP triple-lens captures a wide 122° fixed view plus 2K PTZ close-ups with up to 8× auto-zoom
  • Best for: Homeowners and small businesses wanting continuous, automated perimeter surveillance
  • Not ideal for: Users who need a lightweight, battery-operated camera setup

Triple-lens design pairs a 4K wide-angle lens with two 2K PTZ lenses for full coverage. The system includes a pre-installed 2 TB HDD for continuous local recording, expandable up to 16 TB.


Complete situational awareness - with a 16 MP triple-lens and 2K PTZ with 8× auto-zoom

Upper lens delivers a 4K wide-angle view covering 122 degrees, while the lower lenses use PTZ mechanics and an 8× auto-zoom to lock on subjects. Pan ranges to 360 degrees, allowing full horizontal coverage and precise close-ups up to 50 metres.

Wide scenes stay visible while fast-moving subjects become clear close-ups, reducing blind spots and providing evidence-quality footage when needed.

Faster, smarter review - thanks to AI-Powered Smart Video Finder

On-device and app-based AI indexes footage and permits keyword searches across hours of video, so specific events can be located without manual scrubbing. Smart Video Finder integrates with local storage to keep searches quick and private.

Finding a particular person or event takes seconds rather than hours, saving time during investigations or when checking suspicious activity.

Reliable on-site threat detection - with an on-device AI agent and 8-core CPU

Local AI runs on an 8-core processor to analyse feeds in real time, enabling genuine threat identification, customisable No-Go Zones and immediate actions without constant cloud dependency. Cloud features remain optional for things like push notifications or thumbnail previews.

Alerts are more accurate and privacy is improved through local processing, while cloud options are available only when chosen for extras such as remote previews.

✨ The 4 Key Reasons for eufy Security PoE NVR CCTV System S4 Max
  1. PoE plug-and-play - Simplifies installation, single cable for power and video.
  2. Cross-cam tracking - Maintains continuous follow when one camera reaches its limit.
  3. Pre-installed 2 TB HDD - Enables 24/7 local recording out of the box.
  4. IP67 weatherproofing - Withstands heavy rain and dust for reliable outdoor use.
📋 Technical Details at a Glance
  • Processor: 8-core CPU for on-device AI
  • Channels: 8-channel surveillance, expandable to 16
  • Storage: Pre-installed 2 TB HDD
  • Max Storage: Upgradeable up to 16 TB
  • Camera(s): 16 MP triple-lens Bullet-PTZ camera
❓ Frequently Asked Questions

Q: Can the system record continuously, and how much storage is included?

A: Yes, the system supports 24/7 local recording and includes a pre-installed 2 TB HDD, which is upgradeable up to 16 TB.

Q: How many cameras or channels can the system support?

A: Base configuration supports 8 channels and can be expanded to 16 channels for broader coverage.

Q: Do AI features require cloud storage to work?

A: Local on-device AI runs on an 8-core CPU for real-time analysis and detections, while optional cloud features such as thumbnail previews or remote push notifications will send data to the cloud as needed.

🏆 Our Verdict

The eufy Security PoE NVR CCTV System S4 Max suits homeowners and small businesses that demand continuous, evidence-quality surveillance with smart search. Local AI, cross-cam tracking and a triple-lens arrangement form the core selling point, delivering accurate detection and fast review. While initial setup is more involved than simple battery cameras, long-term value comes from local processing, expandable storage and robust weatherproofing.