A complete guide to the 2-wire video door phone system – featuring a 7-inch IPS indoor monitor, Tuya/Smart Life app support, and remote talk and unlock capabilities.

When it comes to upgrading your home or villa entrance, simplicity and smart functionality are key. The FARHD 2-wire video door phone system delivers both – combining easy installation with powerful features like remote talk and unlock via the Tuya or Smart Life app.

In this guide, we’ll explore how the 2-wire connection works, what makes the 7-inch indoor monitor stand out, and how Tuya app integration puts complete control of your front door at your fingertips.

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Why 2-Wire? The Simplicity Advantage

Traditional video intercom systems often require 4 or more wires, making installation expensive and disruptive. The 2-wire system changes that entirely.

Using just two standard wires (non-polarity, so there’s no worry about connecting them backwards) , the system transmits power, video, audio, and control signals simultaneously. This means:

• Reuse existing wiring – often works with old doorbell or telephone wires already in your walls
• No polarity concerns – connect either way, no risk of reverse polarity damage
• Fast installation – any electrician (or confident DIYer) can set it up quickly
• Lower cost – less labour, less material, less disruption
• Transmission up to 100 metres – plenty of distance for most villa layouts

For homeowners and installers alike, the 2-wire system is the perfect choice for both new builds and retrofits. It saves time, money, and hassle – without sacrificing quality or performance.

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7-Inch IPS Indoor Monitor – Clear, Intuitive, and Smart

The heart of the system is the 7-inch IPS touchscreen indoor monitor. With 1024×600 resolution, it delivers vivid colours, wide viewing angles, and sharp details – so you see every visitor clearly from anywhere in the room.

Key features of the 7-inch indoor monitor:

• IPS touchscreen – responsive, intuitive operation for all ages
• Audio bidirectionnel duplex intégral – speak naturally with visitors, with echo cancellation
• Multiple unlock options – touch the unlock icon on screen, use the Tuya app, tap an IC card, or enter a password
• Motion detection & recording – automatically captures photos and video clips when the doorbell is pressed or motion is detected
• Micro SD card slot – supports up to 128GB for local storage
• Room-to-room calling – if you have multiple indoor monitors installed, communicate between rooms
• Support multilingue – available in English, Russian, Arabic, French, Spanish, and more

The modern, sleek design of the 7-inch monitor blends seamlessly into any interior – from contemporary villas to classic homes.

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Tuya / Smart Life App – Remote Talk and Unlock from Anywhere

The true power of this system is unlocked when you pair it with the Tuya or Smart Life app. Once connected to your 2.4GHz WiFi network, you gain complete remote control of your entrance:

Remote Talk:

• Receive video calls from your door station on your smartphone, wherever you are
• Speak with visitors through the app’s two-way audio
• See live video from the outdoor camera anytime, day or night

Remote Unlock:

• Let in deliveries, guests, or service providers with a single tap
• No need to rush home or leave a key under the mat
• Perfect for busy homeowners, frequent travellers, and rental property managers

Additional App Features:

• Alertes de mouvement – instant notifications when someone approaches your door
• Event recording – review history of calls and motion events
• Family sharing – up to 20 users can connect to the same system
• Vue en direct – check your entrance anytime, from anywhere

The app is free, easy to set up, and works on both iOS and Android.

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How the 2-Wire Connection Works

Understanding the 2-wire connection helps you appreciate the simplicity of this system. Here’s how it works:

1. Outdoor station – Mounted at your entrance, it captures video and audio, and has a call button and card reader.
2. 2-wire cable – A single pair of two-core wires (≥0.5mm) connects the outdoor station to the indoor monitor. This one cable carries power, video, audio, and control signals.
3. Moniteur intérieur – Receives the call, displays video, and allows you to talk and unlock.
4. Power supply – The indoor monitor is powered by a standard adapter; it then supplies power to the outdoor station over the same 2-wire cable.

No network configuration is required for basic operation. The Tuya app connection is optional and only requires a 2.4GHz WiFi network for remote access.

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Technical Specifications (Quick View)

Fonctionnalité	Spécifications
Moniteur intérieur	7-inch IPS touchscreen, 1024×600 resolution
Outdoor camera	1080P 2MP HD, wide angle, infrared night vision
Connexion	2-wire non-polarity, up to 100 metres
Power supply	15V 1.2A adapter (indoor monitor powers outdoor station)
Unlock methods	Indoor monitor button, Tuya app remote, IC card, password
App	Tuya / Smart Life (2.4GHz WiFi)
Stockage	Micro SD card up to 128GB
Détection de mouvement	Yes – with phone alerts
Température de fonctionnement	-40°C to +70°C
Extensibilité	Up to 2 outdoor panels + 4 indoor monitors

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Installation – Simple and Straightforward

Installing the 2-wire video door phone is a straightforward process:

1. Mount the outdoor station near your entrance (about 1.4–1.6 metres high).
2. Run the 2-wire cable from the outdoor station to the indoor monitor location (up to 100 metres).
3. Connect the wires – no polarity, so no wrong way.
4. Mount the indoor monitor on the wall using the included bracket.
5. Plug in the power adapter and power on.
6. Test the system – press the call button, answer, and unlock.

For Tuya app setup, simply download the app, create an account, and follow the in-app instructions to pair your monitor. You’ll be up and running in minutes.

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Pourquoi choisir FARHD ?

FARHD is a professional OEM/ODM manufacturer with over 28 years of experience in video intercom R&D and manufacturing. Since 1998, we have been delivering high-quality video door phone systems and one-stop solutions to clients worldwide.

What sets FARHD apart:

• Founded in 1998 – 28+ years of video intercom expertise
• Source factory – competitive pricing, full quality control
• OEM / ODM ready – custom logo, packaging, and software language available
• Une portée mondiale – serving clients in over 90 countries
• No MOQ for trial orders – start with a sample; scale as you grow
• Full product range – 4-wire CVBS, 4-wire AHD, 2-wire, IP, SIP, and wireless systems

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Ready to Upgrade Your Entrance Security?

La 2-wire video door phone with 7-inch indoor monitor and Tuya/Smart Life app support combines simple installation, crystal-clear video, and remote talk and unlock capabilities – all in one complete package. Whether you’re a homeowner, installer, or project developer, this system delivers the security, convenience, and peace of mind your entrance deserves.

📩 Contact us for catalog, pricing, or to request a sample.

🌐 Website: www.farhd.com
📧 Email: [email protected]

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FARHD – Video Intercom Manufacturer Since 1998.