---
product_id: 324432752
title: "SinLoon RJ11 Coupler RJ11 Female to Female 6P6C Telephone Inline Coupler Straight Telephone Cable Extension Adapter for Landline Fax Machine (Straight)"
brand: "sinloon"
price: "94 Lei"
currency: RON
in_stock: true
reviews_count: 12
category: "Sin Loon"
url: https://www.desertcart.ro/products/324432752-sinloon-rj11-coupler-rj11-female-to-female-6p6c-telephone-inline
store_origin: RO
region: Romania
---

# No signal loss, stable transmission Seamlessly joins 2 RJ11 lines Durable, heat-resistant PCB board SinLoon RJ11 Coupler RJ11 Female to Female 6P6C Telephone Inline Coupler Straight Telephone Cable Extension Adapter for Landline Fax Machine (Straight)

**Brand:** sinloon
**Price:** 94 Lei
**Availability:** ✅ In Stock

## Summary

> 📞 Connect flawlessly, extend effortlessly – never miss a call again!

## Quick Answers

- **What is this?** SinLoon RJ11 Coupler RJ11 Female to Female 6P6C Telephone Inline Coupler Straight Telephone Cable Extension Adapter for Landline Fax Machine (Straight) by sinloon
- **How much does it cost?** 94 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/324432752-sinloon-rj11-coupler-rj11-female-to-female-6p6c-telephone-inline)

## Best For

- sinloon enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** High-quality materials resist heat and interference for long-term reliability.
- • **Universal Compatibility:** Works flawlessly with all RJ11 devices—landlines, fax machines, and more.
- • **Premium Signal Integrity:** Thickened PCB and gold-plated contacts ensure crystal-clear calls and data.
- • **Compact & Discreet Design:** Small, sleek form factor fits perfectly in any home or office setup.
- • **Effortless Line Extension:** Easily connect and extend your RJ11 telephone lines without signal drop.

## Overview

The SinLoon RJ11 Coupler is a compact, high-quality inline adapter designed to join two RJ11 telephone cables seamlessly. Featuring a durable, heat-resistant PCB and gold-plated contacts, it guarantees stable, interference-free signal transmission with no loss. Compatible with all RJ11 devices, this coupler is perfect for extending landline, fax, or answering machine connections in home or office environments.

## Description

desertcart.com: SinLoon RJ11 Coupler RJ11 Female to Female 6P6C Telephone Inline Coupler Straight Telephone Cable Extension Adapter for Landline Fax Machine (Straight) : Electronics

Review: Works well - Just what I needed, built solid.
Review: Well Built Coupler - I purchased this RJ12 Coupler to extend a short data cable and it worked as expected. It feels very well built and will purchase a couple more.

## Features

- 【EASY EXTENSION 】Premium quality inline coupler for join 2 RJ11 (6P6C, 6P4C, 6P2C crystal head)telephone lines together and extend phone line connections with strong anti-interference ability.
- 【NO SIGNAL LOSS】Thickened PBC board, strong and durable, to avoid the problem exposed damage, high temperature resistant, longer service life, RJ11 6P6C Telephone Inline Coupler is used and helps to extend or repair existing patch cables.This inline coupler provides faster data transmission without any signal loss.
- 【SMALL AND EXQUISITE】 SinLoon RJ11 Coupler inline couplers are small and exquisite in size that provides a full range of solutions for voice, home networking, home office and audio.
- 【MATERIAL】High quality sound quality, all copper plated gold needle core, stable transmission signal. Good contact and transmission performance, provide a strong guarantee for stable data transmission, easy to use, convenient connection, no static or sound distortion.RJ11 Coupler plastic casing made of environment-friendly material to protect the internal chip structure, internal insulation, strong anti-interference ability and low signal attenuation coefficient.
- 【WIDE RANGE OF USE】Compatible with all RJ11 devices, such as landline phones, faxes or answering machines. Assistant for home, study, living room, bedroom, office, business meeting, home entertainment and study.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08ZCGY32S |
| Best Sellers Rank | #201 in Telephone Wires |
| Customer Reviews | 4.4 4.4 out of 5 stars (85) |
| Date First Available | March 18, 2021 |
| Item Weight | 1.44 ounces |
| Item model number | SL-RJ11-CF |
| Manufacturer | mandyyan |
| Package Dimensions | 5.91 x 3.07 x 0.83 inches |

## Product Details

- **Brand:** SinLoon
- **Color:** black
- **Compatible Devices:** faxes or answering machines, landline phones
- **Connector Type:** RJ11
- **Specific Uses For Product:** Telephone

## Images

![SinLoon RJ11 Coupler RJ11 Female to Female 6P6C Telephone Inline Coupler Straight Telephone Cable Extension Adapter for Landline Fax Machine (Straight) - Image 1](https://m.media-amazon.com/images/I/714rNy1O5KL.jpg)
![SinLoon RJ11 Coupler RJ11 Female to Female 6P6C Telephone Inline Coupler Straight Telephone Cable Extension Adapter for Landline Fax Machine (Straight) - Image 2](https://m.media-amazon.com/images/I/718ywxJa4GL.jpg)
![SinLoon RJ11 Coupler RJ11 Female to Female 6P6C Telephone Inline Coupler Straight Telephone Cable Extension Adapter for Landline Fax Machine (Straight) - Image 3](https://m.media-amazon.com/images/I/71M2AXZMnaL.jpg)
![SinLoon RJ11 Coupler RJ11 Female to Female 6P6C Telephone Inline Coupler Straight Telephone Cable Extension Adapter for Landline Fax Machine (Straight) - Image 4](https://m.media-amazon.com/images/I/71Sz0IkdINL.jpg)
![SinLoon RJ11 Coupler RJ11 Female to Female 6P6C Telephone Inline Coupler Straight Telephone Cable Extension Adapter for Landline Fax Machine (Straight) - Image 5](https://m.media-amazon.com/images/I/71UjFcx5FRL.jpg)

## Questions & Answers

**Q: Doesn't seem to work, is there a coil or something on the inside?  We use is as a device extension (telescope hand paddle), our other couplers work?**
A: Cables can be straight-pinned or cross-pinned. 
As this was listed as straight, you may need cross-pinned.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well
*by A***S on January 26, 2024*

Just what I needed, built solid.

### ⭐⭐⭐⭐⭐ Well Built Coupler
*by J***E on September 29, 2023*

I purchased this RJ12 Coupler to extend a short data cable and it worked as expected. It feels very well built and will purchase a couple more.

### ⭐⭐⭐⭐⭐ Works Well
*by W***L on October 29, 2024*

Product works as described, have not had any issues

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-11*