---
product_id: 434770059
title: "Quartet-Extra - 2.4G RF Wireless Add-On Headphones Quartet Multiple Listening System, Scalable to 100"
brand: "avantree"
price: "C$12503"
currency: NIO
in_stock: true
reviews_count: 5
category: "Avantree"
url: https://www.desertcart.ni/products/434770059-quartet-extra-2-4g-rf-wireless-add-on-headphones-quartet
store_origin: NI
region: Nicaragua
---

# Lightweight memory foam comfort 2.4G RF tech, ultra-low latency ~30ms 20-hour extended battery life Quartet-Extra - 2.4G RF Wireless Add-On Headphones Quartet Multiple Listening System, Scalable to 100

**Brand:** avantree
**Price:** C$12503
**Availability:** ✅ In Stock

## Summary

> 🎬 Experience the future of group audio—crystal clear, lag-free, and made for sharing!

## Quick Answers

- **What is this?** Quartet-Extra - 2.4G RF Wireless Add-On Headphones Quartet Multiple Listening System, Scalable to 100 by avantree
- **How much does it cost?** C$12503 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/434770059-quartet-extra-2-4g-rf-wireless-add-on-headphones-quartet)

## Best For

- avantree enthusiasts

## Why This Product

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

## Key Features

- • **Marathon Battery Life:** Up to 20 hours of uninterrupted playtime for your longest movie nights or concerts
- • **All-Day Comfort Design:** Ergonomic, lightweight with soft memory foam earpads for pressure-free wear
- • **Seamless Group Listening:** Scale up to 100 headphones for epic silent events without disturbing anyone
- • **Lag-Free Audio Experience:** 2.4G RF tech slashes audio delay to ~30ms—way faster than Bluetooth
- • **Personalized Sound Control:** Built-in individual volume knobs let everyone tune in their perfect level

## Overview

The Quartet-Extra is a 2.4G RF wireless headphone add-on designed exclusively for the Avantree Quartet system, allowing up to 100 users to connect simultaneously. It delivers ultra-low latency audio (~30ms), superior sound quality, and individual volume control in a lightweight, memory foam-padded design. With up to 20 hours of battery life, it’s perfect for extended movie or concert sessions without disturbing neighbors.

## Description

Avantree Q5049-RX, an Add-on RF Wireless Headphones for [Avantree Q5049 Wireless TV Headphones Pack] (Sold Separately), Up to 100 Devices, Individual Volume Controls, 2 EQ Modes, 20H Playtime

Review: Déçue de mon deuxième écouteur acheté il déraille en ne sachant plus se déconnecter. Il tourne en boucle s allumant et s éteignant du coup la batterie toujours vide.
Review: I really do prefer the headphones with metal slides to adjust length as they last much longer. Sound is great and fit just as I like.

## Features

- [ONLY WORKS WITH QUARTET] This single pair of 2.4G wireless headphones is an add-on for the Avantree Quartet bundle (sold separately). Add up to 100 of these headphones to the Quartet bundle and enjoy an outdoor movie or silent concert without disturbing the neighbors.
- [LESS DELAYS, BETTER QUALITY] The Quartet-Extra headphones feature 2.4G technology and NOT Bluetooth. This reduces the audio lag down to ~30ms -- significantly less than the 220ms of standard Bluetooth and even the 40ms of aptX Low Latency. This also improves overall sound quality due to 2.4G's higher bit rate & extended bandwidth.
- [INDIVIDUAL VOLUME CONTROL] Each pair of wireless headphones are equipped with built-in individual volume controls, so everyone can listen at their own desired volume.
- [LIGHTWEIGHT & COMFORTABLE] These headphones are ergonomically designed to be lightweight and flexible, featuring soft memory foam earpads and an adjustable headband. Enjoy all-day, pressure-free use. NOTE: Replaceable earpads are available for purchase.
- [EXTENDED PLAYTIME] With a battery life of up to 20 hours, these headphones will last through your longest movie or concert sessions with time to spare.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09DKS353X |
| Age range (description) | Adult |
| Best Sellers Rank | #81,260 in Electronics ( See Top 100 in Electronics ) #1,508 in Over-Ear Headphones |
| Cable feature | Retractable |
| Charging time | 2 Hours |
| Compatible devices | Avantree Q5049 Wireless TV Headphones Pack, Avantree Quartet, Avantree Audiplex, Avantree Duet |
| Connectivity technology | Wireless |
| Control method | Remote |
| Control type | Volume Control |
| Frequency response | 20000 Hz |
| Headphone jack | 3.5 mm Jack |
| Included components | Carry bag, 3.5mm jack |
| Item model number | WSHT-5049-RX |
| Item weight | 220 Grams |
| Manufacturer | Avantree |
| Material | memory foam |
| Model name | WSHT-5049-RX |
| Noise control | None |
| Number of Items | 1 |
| Product Dimensions | 17 x 10 x 8 cm; 220 g |
| Recommended uses for product | Movie or Concert Sessions |
| Specific uses for product | Home Entertainment |
| Style | Single Headphones |
| Water resistance level | Not Water Resistant |
| Wireless communication technologies | RF |

## Product Details

- **Brand:** Avantree
- **Colour:** Black
- **Ear placement:** Over Ear
- **Form factor:** Over Ear
- **Impedance:** 32 Ohms

## Images

![Quartet-Extra - 2.4G RF Wireless Add-On Headphones Quartet Multiple Listening System, Scalable to 100 - Image 1](https://m.media-amazon.com/images/I/61CF7f0RcWL.jpg)

## Questions & Answers

**Q: what cleaning products can i use to clean the headphones?**
A: These are the cleaning products we recommend for use on our headphones.
Disinfecting Wipes
https://www.amazon.com/dp/B08BKR9YT6
You can also get washable headphone covers for easy cleaning.
https://www.amazon.com/dp/B07BP4PCVY

## Customer Reviews

### ⭐⭐ Review
*by F***O on 25 August 2025*

Déçue de mon deuxième écouteur acheté il déraille en ne sachant plus se déconnecter. Il tourne en boucle s allumant et s éteignant du coup la batterie toujours vide.

### ⭐⭐⭐⭐⭐ Review
*by D***T on 1 November 2024*

I really do prefer the headphones with metal slides to adjust length as they last much longer. Sound is great and fit just as I like.

### ⭐⭐⭐⭐⭐ Review
*by D***M on 30 December 2025*

Added this to my theater audio now have 5 one for each family member

## Frequently Bought Together

- Avantree Quartet-Extra - 2.4G RF Wireless Add-On Headphones Quartet Multiple Listening System, Scalable to 100
- Avantree Quartet - 4 Wireless Headphones & 1 Transmitter for Multiple Group Listening Scalable to 100 with No Lip-Sync Delays for TV Watching, Silent Discos, Hearing Assistance in Church, and More
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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-02-27*