--- product_id: 324432752 title: "SinLoon RJ11 Female to Female 6P6C Telephone Inline Coupler Straight" brand: "sinloon" price: "€ 20.20" currency: EUR in_stock: true reviews_count: 12 category: "Sin Loon" url: https://www.desertcart.hr/products/324432752-sinloon-rj11-female-to-female-6p6c-telephone-inline-coupler-straight store_origin: HR region: Croatia --- # Gold-plated connectors for stable signal 6P6C RJ11 Female-to-Female Coupler Thickened PCB board resists interference SinLoon RJ11 Female to Female 6P6C Telephone Inline Coupler Straight **Brand:** sinloon **Price:** € 20.20 **Availability:** ✅ In Stock ## Summary > 🔌 Connect with confidence—extend your line, not your worries! ## Quick Answers - **What is this?** SinLoon RJ11 Female to Female 6P6C Telephone Inline Coupler Straight by sinloon - **How much does it cost?** € 20.20 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/324432752-sinloon-rj11-female-to-female-6p6c-telephone-inline-coupler-straight) ## 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 - • **Seamless Line Extension:** Effortlessly join two RJ11 cables to expand your landline or fax setup without signal drop. - • **Universal Compatibility:** Works flawlessly with all RJ11 devices—landlines, fax machines, answering systems—keeping your communication seamless. - • **Durable & Heat-Resistant:** Built to last with high-temp resistant materials, ensuring long-term reliability in any environment. - • **Premium Signal Integrity:** Gold-plated copper cores and thick PCB ensure crystal-clear voice and data transmission—no static, no distortion. - • **Compact & Discreet Design:** Small, sleek inline coupler fits anywhere, perfect for home offices and professional setups. ## Overview The SinLoon RJ11 Coupler is a compact, high-quality inline adapter designed to join two RJ11 telephone cables (6P6C) seamlessly. Featuring gold-plated connectors and a thickened PCB board, it guarantees stable, interference-free signal transmission for landlines, fax machines, and answering devices. Its durable, heat-resistant construction ensures long-lasting performance, making it an essential accessory for professional and home communication setups. ## 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: Worked as expected - Worked as expected Review: Needed a specific type of splice - I have a small blackstar desktop practice amp and there is a companion second speaker. Unfortunately, the practice amp has its speaker wire hard wired and is a specific length. I wanted a bit more space between the amp speaker and the extension speaker so I needed a splice block and more cable. This was the correct splice for the speaker cable. ## 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 | #228 in Telephone Wires | | Brand | SinLoon | | Color | black | | Compatible Devices | faxes or answering machines, landline phones | | Connector Type | RJ11 | | Customer Reviews | 4.4 out of 5 stars 98 Reviews | | Finish | Gold | | Finish Type | Gold | | Manufacturer | mandyyan | | Mfr Part Number | 1 | | Model Number | SL-RJ11-CF | | Number of Items | 2 | | Number of Ports | 1 | | Package Quantity | 1 | | Power Plug Type | No Plug | | Specific Uses For Product | Telephone | | Unit Count | 1 Count | | Warranty Description | NO | ## 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 Female to Female 6P6C Telephone Inline Coupler Straight - Image 1](https://m.media-amazon.com/images/I/71UjFcx5FRL.jpg) ![SinLoon RJ11 Female to Female 6P6C Telephone Inline Coupler Straight - Image 2](https://m.media-amazon.com/images/I/718ywxJa4GL.jpg) ![SinLoon RJ11 Female to Female 6P6C Telephone Inline Coupler Straight - Image 3](https://m.media-amazon.com/images/I/714rNy1O5KL.jpg) ![SinLoon RJ11 Female to Female 6P6C Telephone Inline Coupler Straight - Image 4](https://m.media-amazon.com/images/I/81tpZizzlAL.jpg) ![SinLoon RJ11 Female to Female 6P6C Telephone Inline Coupler Straight - Image 5](https://m.media-amazon.com/images/I/71M2AXZMnaL.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 ### ⭐⭐⭐⭐⭐ Worked as expected *by K***N on June 27, 2026* Worked as expected ### ⭐⭐⭐⭐⭐ Needed a specific type of splice *by B***R on September 1, 2024* I have a small blackstar desktop practice amp and there is a companion second speaker. Unfortunately, the practice amp has its speaker wire hard wired and is a specific length. I wanted a bit more space between the amp speaker and the extension speaker so I needed a splice block and more cable. This was the correct splice for the speaker cable. ### ⭐⭐⭐⭐⭐ Works Well *by W***L on October 29, 2024* Product works as described, have not had any issues --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/324432752-sinloon-rj11-female-to-female-6p6c-telephone-inline-coupler-straight](https://www.desertcart.hr/products/324432752-sinloon-rj11-female-to-female-6p6c-telephone-inline-coupler-straight) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-09-01*