--- product_id: 434770059 title: "Quartet-Extra - 2.4G RF Wireless Add-On Headphones Quartet Multiple Listening System, Scalable to 100" brand: "avantree" price: "802 zł" currency: PLN in_stock: true reviews_count: 5 category: "Avantree" url: https://www.desertcart.pl/products/434770059-quartet-extra-2-4g-rf-wireless-add-on-headphones-quartet store_origin: PL region: Poland --- # 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:** 802 zł **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?** 802 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/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 - 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 --- ## 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.pl/products/434770059-quartet-extra-2-4g-rf-wireless-add-on-headphones-quartet](https://www.desertcart.pl/products/434770059-quartet-extra-2-4g-rf-wireless-add-on-headphones-quartet) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-23*