128G local storage, dual analog camera support, dual detector integration, 4‑wire stable transmission – all‑in‑one security at a cost‑effective price.

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Introduction

Today, we are excited to unbox our top‑tier 4‑wire intercom security system. From the moment you open the box, the build quality and powerful configuration are immediately impressive. This is more than just a video intercom – it is an all‑in‑one security hub that integrates local recording, analog camera expansion, detector linkage, and two‑way intercom.

Whether for a home entrance, office, retail shop, or factory gate, this system delivers stable, clear, and intelligent protection with outstanding value for money.

Let’s take a closer look at the impressive features.

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1. Large Local Storage – Supports 128G SD Card, No Extra NVR Needed

Traditional security systems often require an additional NVR or DVR, adding cost and complexity. Our 4‑wire intercom security system features a Micro SD card slot (up to 128GB) pour direct local video recording and playback.

• No extra equipment – Insert an SD card and it works, saving the cost and wiring of an NVR/DVR.
• Easy playback – View recorded footage directly on the indoor monitor – simple and intuitive.
• Enregistrement en boucle – Automatically overwrites old footage, no manual cleanup required.

What this means for you:
You get full security recording functionality at minimal cost. Whether you want to see who came to your door or review nighttime events, it is effortless.

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2. Dual Device Connection – Connect 2 Analog Cameras + 2 Detectors for Complete Coverage

This system’s expandability goes far beyond ordinary video intercoms. In addition to its built‑on HD door station camera, it can also connect:

• 2 analog cameras (AHD/CVBS) – Wired via 2‑wire or 4‑wire cable to monitor gardens, garages, backyards, corridors, etc. Switch between views on the indoor monitor.
• 2 detectors – Support for gas detectors, smoke detectors, infrared motion sensors, etc. When an alarm is triggered, the indoor monitor displays an alert and can send a notification to your mobile app.

Application examples:

• Villa: Door station at the main gate + backyard analog camera + garage analog camera + gas detector + smoke detector → complete coverage, no blind spots.
• Retail shop: Door station at the entrance + analog camera at the checkout counter + warehouse detector → security and theft prevention.

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3. Two‑Way Intercom – Clear Real‑Time Voice Communication

Whether a visitor calls or you proactively check the camera, the system supports high‑quality two‑way audio.

• Echo cancellation – Natural conversations without harsh echoes.
• Noise reduction – Clear communication even in noisy environments (e.g., roadside, factory).
• Indoor monitor & mobile app intercom – Answer from the indoor monitor or use the Tuya app to talk remotely.

Use cases:

• A courier rings the doorbell; you speak to them via your phone, confirm identity, and remotely unlock the door.
• Elderly or children are at home; you communicate with the person at the door via the app to prevent unauthorised entry.

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4. 4‑Wire Stable Transmission – Reliable Signal, Anti‑Interference, Long‑Distance Stability

Transmission stability is critical in any video intercom system. Our system uses mature 4‑wire technology (recommended wire ≥0.5mm, up to 100 metres), offering clear advantages over 2‑wire systems:

• Dedicated power lines – Two cores for signal (audio, video, unlock) and two dedicated cores for power – eliminates crosstalk.
• Strong anti‑interference – Suitable for complex electromagnetic environments, e.g., multi‑tenant buildings or areas near power lines.
• Stable long‑distance operation – No signal attenuation up to 100 metres; clear video and smooth audio.

What this means for you:
No worries about video stuttering or broken conversations caused by long distances or poor wiring. Install once and enjoy long‑term reliability.

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5. Compact Design, Easy Installation – All‑in‑One Security Control

The indoor monitor features a 7‑inch TFT LCD with touch buttons (IPS upgrade available). Its compact size (approx. 19.6×14×2cm) makes it easy to wall‑mount in your hallway, living room, or office.

• Simple wiring – Clearly labelled 4‑wire terminals for quick installation by electricians or confident DIYers.
• Unified control – The indoor monitor integrates intercom, unlock, camera viewing, video playback, and alarm alerts – no switching between multiple devices.
• Modern aesthetics – ABS plastic housing with a clean, contemporary look that fits any interior.

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System Key Specifications

Fonctionnalité	Spécifications
Transmission	4‑wire, recommended ≥0.5mm, up to 100 metres
Écran de moniteur intérieur	7‑inch TFT LCD, 800×480 pixels, touch buttons
Door Station Camera	1000TVL HD, 115° wide angle, infrared night vision, IP65 waterproof
Stockage local	Micro SD card, max 128GB, supports video playback
External Cameras	Connect up to 2 analog cameras (AHD/CVBS)
Detector Inputs	Supports 2 detectors (gas, smoke, motion, etc.)
Two‑Way Intercom	Full‑duplex audio with echo cancellation
Unlock Methods	Indoor monitor unlock, remote app unlock, optional RFID card
Température de fonctionnement	-40°C to +70°C
Alimentation électrique	Standard 15V 1.2A adapter

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Applications idéales

• Maisons – Villas, self‑built houses, townhouses – professional security at an affordable price.
• Offices / Retail shops – Control employee access, receive visitors, monitor checkout areas.
• Small factories / warehouses – Access control + surveillance + detector alerts to prevent accidents.
• Rental apartments – Install indoor monitors in each unit and a door station at the common entrance for centralised management.

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Why This Is the Cost‑Effective Security Upgrade You’ve Been Looking For

• All‑in‑one – Intercom + recording + detector alerts + remote control – saves buying multiple separate devices.
• No NVR needed – SD card local storage eliminates the cost of a recorder and hard drive.
• Stable 4‑wire – Avoids the instability of wireless or interference on 2‑wire systems, reducing maintenance calls.
• Installation facile – No complex network configuration; any electrician can handle it.

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Watch the Unboxing Video

We have recorded a full unboxing video showing the package contents, every component in detail, and a live demonstration of the system in action. Click to watch:

👉 Watch the video here (embed link)

In the video you will see:

• The real look and feel of the indoor monitor and door station
• How to install an SD card and play back recordings
• Switching between two connected analog cameras
• A test of the two‑way intercom audio quality

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Ready to Upgrade Your Security System?

If you are looking for a stable, feature‑rich, easy‑to‑install, and cost‑effective intercom security system, our 4‑wire solution is the perfect choice. Whether for home, office, or retail, it delivers reliable protection.

📧 Contact us for more information, detailed specifications, or a quotation.
🌐 Visit our website: www.farhd.com

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