---
product_id: 440722250
title: "Quartet-Extra - 2.4G RF Wireless Add-On Headphones Quartet Multiple Listening System, Scalable to 100"
brand: "avantree"
price: "1051 kr"
currency: DKK
in_stock: true
reviews_count: 13
category: "Avantree"
url: https://www.desertcart.dk/products/440722250-quartet-extra-2-4g-rf-wireless-add-on-headphones-quartet
store_origin: DK
region: Denmark
---

# 2.4G RF wireless tech, ultra-low latency ~30ms Individual volume control for personalized sound 20-hour battery life for marathon sessions Quartet-Extra - 2.4G RF Wireless Add-On Headphones Quartet Multiple Listening System, Scalable to 100

**Brand:** avantree
**Price:** 1051 kr
**Availability:** ✅ In Stock

## Summary

> 🎧 Sync up, zone out, and never miss a beat with Avantree Quartet-Extra!

## 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?** 1051 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/440722250-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

- • **All-Day Wearability:** Lightweight design with memory foam earpads and adjustable headband ensures pressure-free comfort during long sessions.
- • **Tailored Sound Comfort:** Built-in volume controls let every listener customize their audio level — no more ‘too loud’ complaints.
- • **Endurance Mode Activated:** Up to 20 hours of continuous playback means your entertainment won’t quit before you do.
- • **Seamless Group Listening:** Scale up to 100 headphones for epic silent parties or outdoor cinema nights without disturbing anyone.
- • **Lag-Free Audio Experience:** 2.4G RF tech slashes audio delay to ~30ms, beating Bluetooth by miles for perfectly synced sound.

## Overview

The Avantree Quartet-Extra is a 2.4G RF wireless add-on headphone designed exclusively for the Avantree Quartet system, enabling up to 100 users to enjoy synchronized, low-latency audio with individual volume control. Featuring ultra-low ~30ms audio lag, lightweight memory foam comfort, and a robust 20-hour battery life, it’s perfect for silent movie nights, concerts, and group entertainment without disturbing neighbors.

## Description

Buy Avantree Quartet-Extra - 2.4G RF Wireless Add-On Headphones Quartet Multiple Listening System, Scalable to 100: Over-Ear Headphones - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Sinls to silent party system - Added this to my theater audio now have 5 one for each family member
Review: Works great! - They work great!

## 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 |
| Audio Driver Type | Dynamic Driver |
| Audio Latency | 30 Milliseconds |
| Batteries | 1 CR5 batteries required. (included) |
| Battery Life | 20 Hours |
| Best Sellers Rank | #82,977 in Electronics ( See Top 100 in Electronics ) #1,800 in Over-Ear Headphones |
| Cable Feature | Tangle Free |
| Charging Time | 2 Hours |
| Compatible Devices | Most TVs with Optical / RCA / 3.5mm Aux |
| Connectivity Technology | 2.4G RF Wireless, Optical, RCA, 3.5mm AUX |
| Control Method | Remote |
| Control Type | Volume Control |
| Customer Reviews | 4.0 4.0 out of 5 stars (45) |
| Date First Available | August 25, 2021 |
| Earpiece Shape | Over-ear |
| Frequency Response | 20000 Hz |
| Generation | 1 |
| Hardware Interface | Radio Frequency |
| Headphones Jack | 3.5 mm Jack |
| Included Components | Cable, Headphones |
| Input Device Interface | Radio Frequency |
| Item Weight | 7.8 ounces |
| Item model number | WSHT-5049-RX |
| Manufacturer | Avantree |
| Material | memory foam |
| Model Name | WSHT-5049-RX |
| Noise Control | Sound Isolation |
| Noise Control Features | sound isolation |
| Number of Items | 1 |
| Product Dimensions | 6.69 x 3.94 x 3.15 inches |
| Recommended Uses For Product | Familiy movie, TV Watching |
| Special Feature | Add on 2.4G RF wireless headphones for Avantree Q5049 Set,, No Lip-sync Delay, 2 EQ Modes for Clear Voice & Balanced Sound, Enhanced Volume, Individual Volume Controls, 20H Playtime |
| Specific Uses For Product | Home Entertainment |
| Style | Single Headphones |
| Supports Bluetooth Technology | No |
| Water Resistance Level | Not Water Resistant |
| Wireless Communication Technology | 2.4G RF Wireless |

## Product Details

- **Brand:** Avantree
- **Color:** 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

### ⭐⭐⭐⭐⭐ Sinls to silent party system
*by D***M on December 30, 2025*

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

### ⭐⭐⭐⭐⭐ Works great!
*by B***G on June 5, 2025*

They work great!

### ⭐⭐⭐⭐⭐ Husband loves them
*by A***L on January 18, 2023*

We use for self regulation of tv volume changer of games for us as our hearing quality is very different from eachothers. We have had issues with the product and the company has been fast to respond and remedy. Recommend for that aspect as well as for the sound quality

## 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
- Avantree [Super Stable] Neetto Dual Headphones Stand for Desk, Aluminum Alloy & Metal Gaming Headsets Holder Hanger for Sennheiser, Sony, Audio-Technica, Bose, Beats, Akg, Display Mount - HS908

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**Shop now:** [https://www.desertcart.dk/products/440722250-quartet-extra-2-4g-rf-wireless-add-on-headphones-quartet](https://www.desertcart.dk/products/440722250-quartet-extra-2-4g-rf-wireless-add-on-headphones-quartet)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-24*