---
product_id: 232319299
title: "FERMAX 3431 56304 Interphone 4+N VEO Universal, Neutro"
brand: "fermax"
price: "€ 81.04"
currency: EUR
in_stock: true
reviews_count: 13
category: "Fermax"
url: https://www.desertcart.fi/products/232319299-fermax-3431-56304-interphone-4-n-veo-universal-neutro
store_origin: FI
region: Finland
---

# 100V power source 4+N wiring compatibility Easy surface installation FERMAX 3431 56304 Interphone 4+N VEO Universal, Neutro

**Brand:** fermax
**Price:** € 81.04
**Availability:** ✅ In Stock

## Summary

> 🔔 Upgrade your entryway with timeless tech—because your building deserves the best.

## Quick Answers

- **What is this?** FERMAX 3431 56304 Interphone 4+N VEO Universal, Neutro by fermax
- **How much does it cost?** € 81.04 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/232319299-fermax-3431-56304-interphone-4-n-veo-universal-neutro)

## Best For

- fermax enthusiasts

## Why This Product

- Trusted fermax brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Power:** Operates on a reliable 100V power source—no batteries needed, zero downtime.
- • **Sleek Neutral Design:** Modern neutro finish blends discreetly into any professional or residential setting.
- • **Seamless Vintage Upgrade:** Effortlessly replaces 1980s intercom handsets with universal 4+N wiring compatibility.
- • **Trusted Quality & Support:** Backed by 4.3-star reviews and responsive customer service for peace of mind.
- • **Crystal Clear Installation:** Comes with detailed wiring diagrams for hassle-free setup, even on legacy systems.

## Overview

The FERMAX 3431 56304 Interphone 4+N VEO Universal is a high-quality, easy-to-install replacement handset designed for legacy 4+N intercom systems. Featuring a neutral ABS plastic finish, it operates on a 100V power source without batteries, making it a reliable and sleek upgrade for residential or professional entrances. Supported by clear wiring diagrams and strong customer satisfaction, it ensures seamless integration with older building infrastructure.

## Description

FERMAX 3431 56304 Interphone 4+N VEO Universal, Neutro : desertcart.co.uk

Review: Replacement for 1980s installed handset - Great item. Was worried about wiring it in but easy to follow the wiring colours. It comes with a wiring diagram for lots of old handsets which included mine (replacing the original handset from a 1980s built flat). No issues and good quality.
Review: Easy to install, very good customer service - Good quality product to replace our (very) old intercom handset. The customer service is great, installation cristal clear and the value for money is good! However! Be aware! If you planning to replace your old, awful buzzer and hoping you gonna get a nicer ring, you will be disappointed as although the handset supports this, is your intercom system which needs to support electric ring option instead AC buzzer.

## Features

- FERMAX 3431 56304 INTERFON 4+N VEO UNIVERSAL, neutral
- 3431
- Accessories

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08FMC9KM7 |
| Batteries Required? | No |
| Batteries included? | No |
| Battery Cell Type | Sealed Lead Acid |
| Battery description | Lithium Ion |
| Colour | Neutro |
| Customer Reviews | 4.3 4.3 out of 5 stars (2,802) |
| Date First Available | 27 Aug. 2020 |
| Display style | LCD |
| Finish | Shimmer |
| Included Components | INTERFON 4+N VEO UNIVERSAL FERMAX |
| Installation method | Surface |
| Item Package Quantity | 1 |
| Item Weight | 53 g |
| Item model number | 3431 |
| Manufacturer | FERMAX |
| Material | ABS Plastic |
| Number of Pieces | 1 |
| Part Number | 3431 |
| Power Source | CA |
| Product Dimensions | 4.3 x 8.2 x 21.4 cm; 53 g |
| Special Features | Keine besonderen Funktionen |
| Usage | Entrance systems for buildings and homes |
| Voltage | 100 |
| Wattage | 100 |

## Product Details

- **Brand:** FERMAX
- **Operating system:** Ninguno ( Tecnologia 4+N Audio)
- **CPU model:** Snapdragon
- **Screen size:** 6.1
- **Resolution:** 2340 x 1080
- **Model name:** 56304
- **Wireless carrier:** Unlocked for All Carriers
- **Cellular technology:** 4G
- **Connectivity technology:** Wi-Fi
- **Colour:** Neutro

## Images

![FERMAX 3431 56304 Interphone 4+N VEO Universal, Neutro - Image 1](https://m.media-amazon.com/images/I/11mSXYfnsFL.jpg)
![FERMAX 3431 56304 Interphone 4+N VEO Universal, Neutro - Image 2](https://m.media-amazon.com/images/I/21evKCVhjOL.jpg)
![FERMAX 3431 56304 Interphone 4+N VEO Universal, Neutro - Image 3](https://m.media-amazon.com/images/I/21ikso8-nyL.jpg)
![FERMAX 3431 56304 Interphone 4+N VEO Universal, Neutro - Image 4](https://m.media-amazon.com/images/I/21phH4ONgYL.jpg)
![FERMAX 3431 56304 Interphone 4+N VEO Universal, Neutro - Image 5](https://m.media-amazon.com/images/I/31FO0c0QoHL.jpg)

## Questions & Answers

**Q: Can this be used with the Urmet BiBus system?**
A: Was cheap and easy to install, I think the one it replaced was urmet tho. Hope this helps

**Q: How does the ringing work? Is there a built in speaker to alert when someone rings bell?**
A: Yes there is a buzzer, I believe it uses the handset speaker as there is nothing in the body of the unit.

Mine is plenty loud enough, I replaced an old handset as it wasn’t alerting me

**Q: Does this have a volume control?**
A: Sorry zi don’t know as I am unable to make mine work due to some incompatibility with my old system.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Replacement for 1980s installed handset
*by G***E on 7 December 2024*

Great item. Was worried about wiring it in but easy to follow the wiring colours. It comes with a wiring diagram for lots of old handsets which included mine (replacing the original handset from a 1980s built flat). No issues and good quality.

### ⭐⭐⭐⭐⭐ Easy to install, very good customer service
*by C***A on 31 March 2024*

Good quality product to replace our (very) old intercom handset. The customer service is great, installation cristal clear and the value for money is good! However! Be aware! If you planning to replace your old, awful buzzer and hoping you gonna get a nicer ring, you will be disappointed as although the handset supports this, is your intercom system which needs to support electric ring option instead AC buzzer.

### ⭐⭐⭐⭐⭐ Great Entryphone Intercom!
*by A***R on 19 September 2023*

The FERMAX 3431 56304 INTERFON 4+N VEO Universal replaced an old 1950s entryphone / intercom in one apartment in a block of flats. It is easy to install, if you follow the instructions. The buzzer is good, not jarring, and the in/out audio are very good with great clarity.

## Frequently Bought Together

- FERMAX 3431 56304 INTERFON 4+N VEO Universal, Neutro
- Ring Intercom by Amazon | Upgrade Your Intercom to a Smart System with Remote Unlock, Two-Way Talk, Guest Access | Easy to install | Works with Alexa
- Ring Rechargeable Battery - Quick Release Battery Pack

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**Shop now:** [https://www.desertcart.fi/products/232319299-fermax-3431-56304-interphone-4-n-veo-universal-neutro](https://www.desertcart.fi/products/232319299-fermax-3431-56304-interphone-4-n-veo-universal-neutro)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-19*