---
product_id: 19471413
title: "FosPower 3.5mm Male to Female Auxiliary Stereo Audio Headphone Jack AUX Adapter, 4-Conductor TRRS for iPhone, Smartphones, Tablets, Speakers, Microphone & Card Readers (1 Pack)"
brand: "fospower"
price: "8139CFA"
currency: XOF
in_stock: true
reviews_count: 13
category: "Fos Power"
url: https://www.desertcart.sn/products/19471413-fospower-3-5mm-male-to-female-auxiliary-stereo-audio-headphone
store_origin: SN
region: Senegal
---

# 4-Conductor TRRS for mic & stereo Ultra-slim design fits thick cases 24k gold-plated corrosion-resistant connectors FosPower 3.5mm Male to Female Auxiliary Stereo Audio Headphone Jack AUX Adapter, 4-Conductor TRRS for iPhone, Smartphones, Tablets, Speakers, Microphone & Card Readers (1 Pack)

**Brand:** fospower
**Price:** 8139CFA
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your audio game—never miss a beat or a call!

## Quick Answers

- **What is this?** FosPower 3.5mm Male to Female Auxiliary Stereo Audio Headphone Jack AUX Adapter, 4-Conductor TRRS for iPhone, Smartphones, Tablets, Speakers, Microphone & Card Readers (1 Pack) by fospower
- **How much does it cost?** 8139CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/19471413-fospower-3-5mm-male-to-female-auxiliary-stereo-audio-headphone)

## Best For

- fospower enthusiasts

## Why This Product

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

## Key Features

- • **Slim & Sleek Fit:** Designed to slide through even the thickest phone cases for uninterrupted use.
- • **Voice Command Ready:** Supports volume, calls, and voice assistants like Siri & Google Assistant.
- • **Universal Compatibility:** Works flawlessly with iPhones, Androids, tablets, speakers, and card readers.
- • **Seamless Audio Extension:** Effortlessly extend your headphone reach without sound loss or interference.
- • **Premium Gold-Plated Connectors:** Experience crystal-clear audio with corrosion-resistant 24k gold contacts.

## Overview

The FosPower 3.5mm Male to Female AUX Adapter is a premium 4-conductor TRRS cable extender featuring ultra-slim design and 24k gold-plated connectors. It ensures lossless stereo and microphone compatibility across a wide range of devices, including smartphones, tablets, speakers, and card readers, while fitting snugly through thick protective cases. Perfect for professionals who demand flawless audio and seamless connectivity on the go.

## Description

Buy FosPower 3.5mm Male to Female Auxiliary Stereo Audio Headphone Jack AUX Adapter, 4-Conductor TRRS for iPhone, Smartphones, Tablets, Speakers, Microphone & Card Readers (1 Pack): Adapters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Outstanding Solution! - I purchased this extender to allow me to listen to my Custom In Ear Monitors on my iPhone with the Apple Extended Battery Case. I was so sad when i bought this case and realized I would need to buy a new cable for my phone to work with it. Well, this was a MUCH better and cheaper solution! There is a slight bit of resistance from the case due to the length of the thin portion of this connector. It is a perfect fit, but it's really close. Right before it inserts into the headphone jack, there is a tiny bit of interference with the case. It's not enough to cause any issues, although if you pull lightly on it, you can feel that an "outward force" exists on the extender due to the case. I also tested the sound quality using this extender vs no extender using Jerry Harvey JH13 $1200 in-ear monitors... if there was sound degradation, I would absolutely hear it. This does not affect the sound in any sort of noticeable amount. If there is degradation, it is not audible to the human ear. This was a big relief for me as an Audiophile. I used The 1975 - "I Like It When You Sleep, For You Are Beautiful Yet So Unaware of It" as my test track. Great frequency range to listen for any degradation and all checks out! All this said, it works well, it IS compatible with the Apple Extended Battery Case.
Review: Just what I needed and glad I picked these... - Just what I was looking for. I bought this 5 pack because I have numerous devices and cables that have thick cases and large cable connector heads. I'm very happy with this product. I've tried them and they work on everything I have. I've tried the FosPower adapters on my iPods (3 different types), Kindle Fires (3 different ones) and iPhones. All my devices have larger/thick cases on them and the FosPowers fit and work just fine. One reviewer mentioned they won't work on "ANY" Mophie Battery Pack/Case which isn't correct. Another reviewer stated it doesn't work with a iPhone 6S+ which I can't speak too. I have a iPhone 4S and my wife has an iPhone 5S, both have Mophie Power Packs, and the adapters work great. The iPhone 5S with Mophie has a deep recess into the headphone jack but just a little pressure will seat it. The adapters are well made with solid construction and quality materials. I wouldn't recommend having your device in your front or rear pocket with an adapter inserted if you're going to sit down. I could see it potentially breaking since it is a rigid adapter that sticks out about 3/4 - 1 inch after inserted. Nice product and worth every penny...

## Features

- [MALE TO FEMALE] Connectors: TRRS mini-stereo (3.5mm) male to TRRS mini-stereo (3.5mm) female cable.
- [LISTEN FROM A DISTANCE] Audio headphone jack extender adapter.
- [SLIM DESIGN] Ultra-slim audio jack adapter extends the reach of any 3.5mm (1/8") cable/plug through THICK mobile device cases.
- [PREMIUM BUILT CABLES] 24k gold plated connectors resist corrosion and reduce tarnish.
- [COMPATIBILITY] Works with any device with a 3.5mm (1/8") headphone jack, including headsets with a microphone, credit card readers (such as Square/PayPal), and car/office/home audio systems. Volume control/play/pause/call/hang-up features are compatible, and voice commands such as "Siri" and "Ok Google" also work.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B016AHYRNW |
| Best Sellers Rank | #33,504 in Electronics ( See Top 100 in Electronics ) #509 in Headphone Adapters |
| Brand | FosPower |
| Color | 01 Pack |
| Compatible Devices | Cellular Phones, Headphone, MP3 Player, Tablet |
| Connector Type | Auxiliary |
| Customer Reviews | 4.4 out of 5 stars 4,337 Reviews |
| Finish | Gold |
| Finish Type | Gold |
| Item Dimensions | 2.5 x 0.06 x 2.19 inches |
| Item Weight | 4.54 g |
| Item dimensions L x W x H | 2.5 x 0.06 x 2.19 inches |
| Manufacturer | FosPower |
| Mfr Part Number | FOSCBL-2178-01 |
| Model Number | FOSCBL-2178-01 |
| Number of Items | 1 |
| Number of Ports | 1 |
| Package Quantity | 1 |
| UPC | 813154021780 |
| Unit Count | 1 Count |
| Warranty Type | Limited |

## Product Details

- **Brand:** FosPower
- **Color:** 01 Pack
- **Compatible Devices:** Cellular Phones, Headphone, MP3 Player, Tablet
- **Connector Type:** Auxiliary
- **Item dimensions L x W x H:** 2.5 x 0.06 x 2.19 inches

## Images

![FosPower 3.5mm Male to Female Auxiliary Stereo Audio Headphone Jack AUX Adapter, 4-Conductor TRRS for iPhone, Smartphones, Tablets, Speakers, Microphone & Card Readers (1 Pack) - Image 1](https://m.media-amazon.com/images/I/51z0g4UKoQL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Outstanding Solution!
*by T***E on June 18, 2016*

I purchased this extender to allow me to listen to my Custom In Ear Monitors on my iPhone with the Apple Extended Battery Case. I was so sad when i bought this case and realized I would need to buy a new cable for my phone to work with it. Well, this was a MUCH better and cheaper solution! There is a slight bit of resistance from the case due to the length of the thin portion of this connector. It is a perfect fit, but it's really close. Right before it inserts into the headphone jack, there is a tiny bit of interference with the case. It's not enough to cause any issues, although if you pull lightly on it, you can feel that an "outward force" exists on the extender due to the case. I also tested the sound quality using this extender vs no extender using Jerry Harvey JH13 $1200 in-ear monitors... if there was sound degradation, I would absolutely hear it. This does not affect the sound in any sort of noticeable amount. If there is degradation, it is not audible to the human ear. This was a big relief for me as an Audiophile. I used The 1975 - "I Like It When You Sleep, For You Are Beautiful Yet So Unaware of It" as my test track. Great frequency range to listen for any degradation and all checks out! All this said, it works well, it IS compatible with the Apple Extended Battery Case.

### ⭐⭐⭐⭐⭐ Just what I needed and glad I picked these...
*by R***D on March 4, 2016*

Just what I was looking for. I bought this 5 pack because I have numerous devices and cables that have thick cases and large cable connector heads. I'm very happy with this product. I've tried them and they work on everything I have. I've tried the FosPower adapters on my iPods (3 different types), Kindle Fires (3 different ones) and iPhones. All my devices have larger/thick cases on them and the FosPowers fit and work just fine. One reviewer mentioned they won't work on "ANY" Mophie Battery Pack/Case which isn't correct. Another reviewer stated it doesn't work with a iPhone 6S+ which I can't speak too. I have a iPhone 4S and my wife has an iPhone 5S, both have Mophie Power Packs, and the adapters work great. The iPhone 5S with Mophie has a deep recess into the headphone jack but just a little pressure will seat it. The adapters are well made with solid construction and quality materials. I wouldn't recommend having your device in your front or rear pocket with an adapter inserted if you're going to sit down. I could see it potentially breaking since it is a rigid adapter that sticks out about 3/4 - 1 inch after inserted. Nice product and worth every penny...

### ⭐⭐⭐⭐⭐ Solves the L-Connector problem
*by S***R on February 4, 2017*

Works great - This extender allows me to listen to my streaming music all day using my unlimited cell data plan rather than using the company WiFi. Before, I couldn't plug my computer's stereo speakers into my phone because the computer speakers have an L-shaped 3.5mm connector. With the case on my phone, the L-shape wouldn't allow the connector to insert all the way. Now I'm happy as can be because I get great sound out of my computer speakers and it's easy to turn up, down or off when I'm on a call or in meetings. The connectors appear to be made of quality materials, though I admit freely I'm not any kind of an expert in this area. I never get any crackling or feedback, and I always get a very good, solid connection every time I plug into my phone's headphone jack. I told my husband about my solution and now he does the same thing to listen to his favorite streaming audio during the day.

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-09-13*