If you want premium audiophile-grade sound and all-day battery life for immersive listening, choose Amazon Renewed Sennheiser Momentum 4; if you need a specialized travel bundle to wirelessly connect to in-flight entertainment systems with active noise cancellation, choose Avantree Relay.
• Amazon Renewed Sennheiser Momentum 4: Delivers exceptional audio fidelity with a massive 60-hour battery life and adaptive noise cancellation, but it is an over-ear design that may not suit those seeking ultra-portability or specific airplane jack connectivity.
• Avantree Relay: Offers a unique two-in-one solution combining a Bluetooth transmitter for aircraft seats with ANC earbuds for versatile daily use, though its 25-hour total battery life and form factor are tailored strictly for travel scenarios rather than general high-fidelity music consumption.
• Best for the serious listener: The Sennheiser Momentum 4 is the clear winner for anyone prioritizing sound quality and long-duration comfort.
• Best for the traveler: The Avantree Relay bundle is the only logical choice for passengers who need to bypass airplane seat jacks without using their own headphones directly on the device.
The Amazon Renewed Sennheiser Momentum 4 stands out as a powerhouse for individuals who treat audio as a central part of their daily routine. Its primary strength lies in the engineering behind the 42mm transducer system, which pushes the frequency range from 6 Hz to 22 kHz. This wide spectrum ensures that whether you are listening to deep bass-heavy tracks or intricate classical compositions, the detail remains crisp. For professionals working remotely or students studying in noisy environments, the Adaptive Noise Cancellation provides a necessary barrier against distractions, while the Adjustable Transparency Mode allows you to stay aware of your surroundings when needed without removing the headphones.
Comfort is a critical factor for anyone looking for the best wireless gaming headset for meetings or a device to wear during long flights. These headphones feature a lightweight folding design with deeply cushioned ear pads and a padded headband. The physical build suggests a focus on extended wearability, allowing users to remain immersed in their work or entertainment without the fatigue often associated with heavier over-ear models. Furthermore, the inclusion of four digital beamforming microphones ensures that voice pick-up remains high-quality even in windy or chaotic conditions, making them a robust tool for professional calls.
However, this product is not a universal fit for every scenario. If your primary use case involves traveling on commercial flights where you must plug into the 3.5 mm seatback jack, the Momentum 4 requires additional adapters or cables to function in that specific way, whereas other solutions are built natively for that interface. Additionally, while the app control offers extensive customization through an integrated equalizer and presets, users who prefer a completely analog experience might find the reliance on the Smart Control Plus app for features like the ANC off switch unnecessary. It is also worth noting that the warranty is a 90-day limited warranty, which differs from standard new-product guarantees, so buyers should be aware of the condition specifics associated with renewed items.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-27 · 6 min read · Independent comparison
The Avantree Relay is a niche product designed with a very specific problem in mind: how to listen to in-flight entertainment wirelessly. Unlike standard headphones, this bundle includes a dedicated Bluetooth transmitter that plugs directly into the 3.5 mm audio jack found on most airplane seats. Once connected, the included Infinity NC earbuds pair with the transmitter, allowing passengers to enjoy movies, music, and announcements without the tangle of wires or the poor quality of standard airline headsets. The system utilizes aptX Adaptive technology to ensure low-latency audio, meaning the sound stays synchronized with the video on the screen, a crucial feature for avoiding the lag that ruins the movie-watching experience.
Beyond the cabin, the Avantree Relay serves travelers who need versatility. The Infinity NC earbuds themselves feature a six-microphone active noise-cancelling system, which helps reduce surrounding noise in busy airports, offices, or crowded cafes. They support LE Audio and Auracast broadcasts, making them compatible with modern public address systems and compatible devices like phones, PCs, and TVs. The bundle approach means you get a complete wireless travel kit in one package, including the transmitter and the earbuds, eliminating the need to buy separate components. The onboard volume controls on the transmitter add another layer of convenience, letting you adjust levels without reaching into your pocket or bag.
Despite its utility, this product has clear limitations for general audio enthusiasts. The earbuds are designed primarily as a companion to the Relay transmitter for travel purposes, and while they work with other devices, they do not offer the same driver size or frequency response breadth as dedicated over-ear headphones. The battery life is listed at up to 25 hours, which is sufficient for long trips but falls short of the 60-hour capability found in competing over-ear models. Furthermore, the compatibility list explicitly excludes certain real-time monitoring applications, musical instruments, and assistive listening devices, so users with specific professional needs in those areas should verify their requirements before purchasing.
• Best for Battery Life → Amazon Renewed Sennheiser Momentum 4, offering a massive 60 hours of playback compared to the Relay's 25 hours.
• Best for In-Flight Entertainment → Avantree Relay, as it includes a dedicated transmitter for 3.5 mm airplane jacks, a feature the Momentum 4 lacks natively.
• Best for Audio Fidelity → Amazon Renewed Sennheiser Momentum 4, thanks to its 42mm dynamic drivers and 6 Hz to 22 kHz frequency range.
• Best for Lightweight Portability → Avantree Relay, since true wireless earbuds are inherently more compact and easier to carry than over-ear headphones.
• Best for Meeting Clarity → Amazon Renewed Sennheiser Momentum 4, utilizing four digital beamforming microphones specifically optimized for voice pick-up and wind suppression.
• Best for Travel Bundles → Avantree Relay, providing both the transmitter and earbuds in a single package for immediate use on planes.
• Best for Customization → Amazon Renewed Sennheiser Momentum 4, featuring an app with adjustable EQs, presets, and sound modes for a personalized experience.
• Best for Active Noise Cancellation → Both offer strong ANC, but Avantree uses a six-microphone system for earbuds, while Sennheiser uses adaptive cancellation for over-ears.
After weighing the specifications and intended use cases, I would buy the Amazon Renewed Sennheiser Momentum 4 for my personal setup, particularly because I prioritize sound quality and battery longevity for my work. While the Avantree Relay solves a specific travel pain point, the Momentum 4 offers a superior audio experience that feels more substantial for daily listening. If I were flying tomorrow and needed to watch a movie immediately without fumbling for adapters, I might reach for the Avantree bundle, but for the general purpose of being the best wireless gaming headset for meetings or a reliable companion for long commutes, the Sennheiser is the stronger investment. Its 60-hour battery and premium driver system simply outweigh the convenience of the airplane adapter for most users.
Yes, the Amazon Renewed Sennheiser Momentum 4 features four digital beamforming microphones designed to suppress wind noise and optimize voice clarity, making them excellent for professional calls.
The Avantalk Infinity NC earbuds can pair directly with phones, PCs, and TVs, but the Relay transmitter itself is designed to connect to 3.5 mm sources like airplanes and does not pair with phones or assistive listening devices.
The Sennheiser Momentum 4 offers significantly longer endurance with up to 60 hours of playback time, whereas the Avantree Relay bundle provides up to 25 hours of battery life.
While they are lightweight and foldable, the over-ear design might be bulky for some sleepers; however, they include a 3.5 mm cable option for wired use if you need to avoid wireless interference during rest.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.