--- product_id: 567186663 title: "Quartet-Extra - 2.4G RF Wireless Add-On Headphones Quartet Multiple Listening System, Scalable to 100" brand: "avantree" price: "€ 337.74" currency: EUR in_stock: true reviews_count: 5 category: "Avantree" url: https://www.desertcart.at/products/567186663-quartet-extra-2-4g-rf-wireless-add-on-headphones-quartet store_origin: AT region: Austria --- # Lightweight ergonomic comfort 2.4G RF tech, ultra-low 30ms latency 20-hour battery life, marathon-ready Quartet-Extra - 2.4G RF Wireless Add-On Headphones Quartet Multiple Listening System, Scalable to 100 **Brand:** avantree **Price:** € 337.74 **Availability:** ✅ In Stock ## Summary > 🎬 Experience the future of group audio—no wires, no lag, all vibe. ## 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?** € 337.74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/567186663-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 Comfort Design:** Memory foam earpads and adjustable headband keep you comfy through every movie or concert. - • **Endurance Battery Power:** Up to 20 hours of uninterrupted playback—because your entertainment shouldn’t quit early. - • **Seamless Group Listening:** Scale up to 100 headphones for epic silent events—be the host everyone envies. - • **Lag-Free Audio Experience:** 2.4G RF tech slashes audio delay to ~30ms, crushing Bluetooth lag for crystal-clear sync. - • **Personalized Volume Control:** Each listener sets their perfect sound level—no more ‘too loud’ or ‘too quiet’ debates. ## Overview The Avantree Quartet-Extra is a 2.4G RF wireless headphone add-on designed exclusively for the Avantree Quartet system, enabling up to 100 users to enjoy synchronized audio with ultra-low 30ms latency. Featuring individual volume controls, ergonomic memory foam earpads, and a robust 20-hour battery life, these lightweight headphones deliver premium sound quality and comfort for extended group entertainment sessions. ## Description Avantree Quartet-RX Extra RF Wireless Earpiece for [Avantree Quartet Pack for Wireless TV], Up to 100 Devices, Individual Volume Controls, 2 EQ Modes, 20H Playback Time Review: Perfect - 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: These DO work with the Duet - The two headsets that came with my Duet are both falling to pieces, so I noticed that this item (an extra headset for the Quartet) was 1] built differently and 2] ten quid cheaper than the extra headset for the Duet. However, the desertcart product description implied that these headphones would not work other systems. The Avantree website begs to differ. So I bought this item and it works - pairs OK with the Duet. I'm a fan of Avantree RF headsets because of their low latency - their audio quality is subjective, but is okay for my 84 year-old ears. I've never managed to overcome lip-sync problems with Bluetooth OTH phones. Not had them long, but they seem comfortable and I hope they last a bit longer than the poor build quality Duet ones. ## 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 | | Antenna Location | Movie or Concert Sessions | | Audio Driver Type | Dynamic Driver | | Audio Latency | 30 Milliseconds | | Battery Average Life | 20 Hours | | Battery Charge Time | 2 Hours | | Box Contents | Ear Cushions | | Brand | Avantree | | Brand Name | Avantree | | Cable Features | Without Cable | | Carrying Case Color | Black | | Carrying Case Material | Faux Leather | | Colour | Black | | Compatible Devices | Quartet Bundle Transmitter | | Control Method | Remote | | Control Type | Volume Control | | Controller Type | wireless volume controller | | Country of Origin | USA | | Customer Package Type | Rigid | | Customer Reviews | 4.3 out of 5 stars 52 Reviews | | Ear Placement | Over Ear | | Earpiece Shape | Over Ear | | Enclosure Material | Plastic | | Form Factor | Over Ear | | Frequency Range | 20 Hz - 20,000 Hz | | Frequency Response | 20000 Hz | | Headphone Form Factor | Over Ear | | Headphone Jack | 3.5 mm Jack | | Headphones Ear Placement | Over Ear | | Impedance | 32 Ohms | | Impedance Unit of Measure | 32 Ohms | | Is Autographed | No | | Item Weight Unit of Measure | 220 Grams | | Manufacturer | Avantree | | Model Name | WSHT-5049-RX | | Model Number | WSHT-5049-RX | | Network Connectivity Technology | Wireless | | Noise Control | None | | Number of Items | 1 | | Number of Power Levels | 5 | | Product Features | Lightweight | | Specific Uses For Product | watching_tv | | Style Name | Single Headphones | | Subject Character | no character | | Theme | Movie | | Water Resistance Level | Not Water Resistant | | Wireless Technology Type | RF | ## Product Details - **Brand:** Avantree - **Colour:** Black - **Form Factor:** Over Ear - **Impedance:** 32 Ohm - **Frequency Response:** 20000 Hz ## 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 ### ⭐⭐⭐⭐⭐ Perfect *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. ### ⭐⭐⭐⭐⭐ These DO work with the Duet *by W***K on 18 July 2026* The two headsets that came with my Duet are both falling to pieces, so I noticed that this item (an extra headset for the Quartet) was 1] built differently and 2] ten quid cheaper than the extra headset for the Duet. However, the Amazon product description implied that these headphones would not work other systems. The Avantree website begs to differ. So I bought this item and it works - pairs OK with the Duet. I'm a fan of Avantree RF headsets because of their low latency - their audio quality is subjective, but is okay for my 84 year-old ears. I've never managed to overcome lip-sync problems with Bluetooth OTH phones. Not had them long, but they seem comfortable and I hope they last a bit longer than the poor build quality Duet ones. ### ⭐⭐⭐⭐⭐ responde a lo anunciado *by L***. on 23 November 2024* responde a lo anunciado ## 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.at/products/567186663-quartet-extra-2-4g-rf-wireless-add-on-headphones-quartet](https://www.desertcart.at/products/567186663-quartet-extra-2-4g-rf-wireless-add-on-headphones-quartet) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-10-22*