---
product_id: 100209046
title: "Uvital RJ11 Duplex Wall Jack Adapter Dual Phone Line Splitter Wall Jack Plug 1 to 2 Modular Converter Adapter for Office Home Fax Model Cordless Phone System, White, Wireless (2 Pack)"
brand: "uvital"
price: "$20.56"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/100209046-uvital-rj11-duplex-wall-jack-adapter-dual-phone-line-splitter
store_origin: US
region: United States of America
---

# plug & play simplicity 4-conductor stable connection 2-port dual expansion Uvital RJ11 Duplex Wall Jack Adapter Dual Phone Line Splitter Wall Jack Plug 1 to 2 Modular Converter Adapter for Office Home Fax Model Cordless Phone System, White, Wireless (2 Pack)

**Brand:** uvital
**Price:** $20.56
**Availability:** ✅ In Stock

## Summary

> 📞 Double your lines, double your productivity!

## Quick Answers

- **What is this?** Uvital RJ11 Duplex Wall Jack Adapter Dual Phone Line Splitter Wall Jack Plug 1 to 2 Modular Converter Adapter for Office Home Fax Model Cordless Phone System, White, Wireless (2 Pack) by uvital
- **How much does it cost?** $20.56 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/100209046-uvital-rj11-duplex-wall-jack-adapter-dual-phone-line-splitter)

## Best For

- uvital enthusiasts

## Why This Product

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

## Key Features

- • **No Hassle Setup:** Plug and play design means zero downtime—just connect and go.
- • **Office & Home Ready:** Perfect for multitasking environments demanding dependable phone line expansion.
- • **Double Your Connectivity:** Seamlessly split one RJ11 jack into two for simultaneous device use.
- • **Crystal Clear Calls Every Time:** 4-conductor duplex design guarantees reliable voice clarity without interference.
- • **Universal Device Compatibility:** Effortlessly supports phones, fax machines, answering machines, and caller ID units.

## Overview

The Uvital RJ11 Duplex Wall Jack Adapter is a dual-port splitter that converts a single RJ11 phone jack into two outputs, enabling simultaneous connection of two devices. Featuring a 4-conductor duplex design, it ensures stable and clear voice communication. Compatible with standard phones, fax machines, and caller ID devices, this plug-and-play adapter is ideal for both office and home use. Note: Not compatible with VOIP or internet data transmission.

## Description

Uvital RJ11 Duplex Wall Jack Adapter Dual Phone Line Splitter Wall Jack Plug 1 to 2 Modular Converter Adapter for Office Home Fax Model Cordless Phone System, White, Wireless (2 Pack)

## Features

- [Dual-Port Expansion] Converts a single modular phone jack into two outputs, allowing connection of two devices simultaneously
- [Please Note] Designed for splitting standard RJ11 phone lines — not for signal conversion or internet/network transmission. Not compatible with VOIP phones or Cox equipment
- [Stable Connection] 4-conductor duplex in-wall adapter ensures clear, reliable voice and data performance
- [Universal Compatibility] Works with phones, fax machines, answering machines, caller ID,etc
- [Plug and Play] Easily plugs into any standard modular wall jack

## Product Details

- **Compatible Devices:** Telephone
- **Connector Type:** RJ11
- **Color:** White
- **Item dimensions L x W x H:** 5.91 x 4.13 x 1.18 inches
- **Brand:** Uvital

## Images

![Uvital RJ11 Duplex Wall Jack Adapter Dual Phone Line Splitter Wall Jack Plug 1 to 2 Modular Converter Adapter for Office Home Fax Model Cordless Phone System, White, Wireless (2 Pack) - Image 1](https://m.media-amazon.com/images/I/61fvaexXNRL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: 0ld wall recepter has four holes for phone line to plug into. can I buy a phone to match?**
A: Any land line phone with a standard line plug or attached line should work just fine.

**Q: what side does the phone line plug in and what side to plug the fax line or does it matter two different numbers**
A: The only one mattering is the one to the phone line.  The others are your choice.

**Q: I have one wall jack, with two lines. Can I use this to have two phones plugged in, and have both phones receive both lines?**
A: no only one phone line can use the jack not two different lines

**Q: will this work to run my wireless printer and my computer?**
A: It works wonderfully with my home phone and printer/fax. Thus far I have not had any complaints.

## Frequently Bought Together

- Uvital RJ11 Duplex Wall Jack Adapter Dual Phone Line Splitter Wall Jack Plug 1 to 2 Modular Converter Adapter for Office Home Fax Model Cordless Phone System, White(2 Pack)
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-04-27*