
Eufy NVR Security System S4 Max
Description
The Eufy NVR Security System S4 Max delivers full‑scene clarity with a 4K wide‑angle lens and a 2K PTZ module for 360° tracking and 8× auto‑zoom. Powered by a fast local AI agent, it identifies real threats, follows movement intelligently, and keeps every subject perfectly framed. With smart video search, IP65 weather protection, two‑way talk, and expandable NVR support, it’s built for reliable, all‑day security without subscription fees.
KEY FEATURES
4K Triple‑Lens Bullet‑PTZ Camera The upper 4K wide‑angle lens delivers a crisp 122° fixed view, while the lower 2K PTZ camera provides 8× auto‑zoom and smooth 360° rotation for complete coverage.
Auto‑Framing & Group Tracking When motion is detected, the PTZ camera locks on automatically—tracking subjects with sharp, centred close‑ups from up to 50 m away. Auto‑zoom keeps them perfectly framed until they leave view.
Live Cross‑Cam Tracking All connected cameras work together to follow movement in real time. As a subject moves out of one camera’s range, another instantly takes over for uninterrupted monitoring.
Local AI Agent A powerful 6T/8‑core AI engine delivers real‑time analysis, accurate threat detection, and smart responses. Customise no‑go zones and alerts for precise, tailored security.
Smart Video Search — No Subscription Needed Skip endless scrolling. Find events instantly by searching keywords directly in the app.
IP65 Weatherproof & Two‑Way Talk Built to withstand harsh weather with IP65 protection. AI noise reduction ensures clear, distraction‑free two‑way communication.
Expandable NVR System The 8‑port NVR expands to 16 channels via a PoE switch (not included). Supports up to 8 Bullet‑PTZ cameras (2 channels each) or up to 16 bullet/turret cameras. Includes a 2TB HDD, upgradeable to 16TB for continuous 24/7 recording.
Specification:
| Resolution |
Bullet 4K, PTZ 2K+2K |
| Lens & FOV | 16MP Triple Lens, 360° PTZ |
| Zoom |
8× Hybrid Zoom(3× Optical Zoom) |
| Color Night Vision |
Starlight/Spotlight/infrared |
| Warning LIght |
White/Red & Blue Warning Light |
| AI & Smart Features | |
| AI Recognition |
Person/Car/Pet/Stranger |
| Live Cross-Cam AI Tracking | Yes |
| Smart Video Search | Yes |
| Recording & Storage | |
| PoE 24/7 Recording | Yes |
|
Local Storage |
2TB Hard Drive (Expandable Up to 16TB) |
|
Operation & System |
|
|
NVR Channel |
8 Channels (Expandable Up to 16) |
| Usage Mode | App/GUI/Web |
| NVR Compatibility | Compatible with eufy other products (requires eufy Wi-Fi Module T8709 for wireless device support) |
Refund Policy
Returns & Refund Policy
At SereniLiving, we want to ensure that any issues with faulty or defective products are handled appropriately. Please read our returns policy carefully before making a purchase.
Change of Mind Returns
We do not accept returns or provide refunds for change of mind, including where a customer no longer wants or requires the product after purchase.
Please review the product description, specifications and compatibility carefully before placing your order.
Faulty, Damaged or Incorrect Items
Please inspect your order as soon as you receive it.
If your product is faulty, defective, damaged on arrival, or you have received an incorrect item, please contact us within 14 days of receiving your order so that we can assess the issue and provide an appropriate resolution.
To report an issue, please contact:
Please provide your order details, a description of the issue and, where applicable, photographs or other evidence showing the fault or damage.
Returning a Faulty Product
Returns must first be authorised by SereniLiving. Please do not send any product back before contacting us and receiving return instructions.
Once your return request has been reviewed and accepted, we will provide you with the appropriate return address and instructions.
The customer is responsible for the cost of returning the item to us.
Items returned without prior authorisation may not be accepted.
Manufacturer Warranty
Products are covered by the applicable manufacturer warranty.
Where an issue occurs outside the initial 14-day faulty return period but is covered by the manufacturer's warranty, the claim will be handled in accordance with the relevant manufacturer's warranty terms and conditions.
Warranty coverage, duration and exclusions may vary depending on the product and manufacturer.
Non-Returnable Items
Except where a product is faulty or where otherwise required by applicable law, we do not accept returns for:
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Change of mind
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Products that are no longer wanted or required
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Sale or clearance items
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Gift cards
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Products damaged through misuse, improper installation, accidental damage or failure to follow the manufacturer's instructions
Refunds
Once we receive and inspect an authorised faulty return, we will notify you whether your refund has been approved.
If approved, the refund will be issued to your original payment method. Please allow up to 10 business days for the refund to be processed. Your bank or card provider may require additional time for the refund to appear in your account.
If more than 15 business days have passed since your refund was approved, please contact:
Contact Us
For questions regarding returns, faulty products or warranty claims, please contact us at:

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