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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-26 · 6 min read · Independent comparison
• Beeitzie Airplane — biggest strength: Bluetooth 5.4 with a Qualcomm chip, aptX-Adaptive and aptX-Low Latency support, and over 24 hours of playback on one charge.
• Beeitzie Airplane — biggest trade-off: It ships as a single unit, and in Dual Link mode (two headphones at once) the audio format drops to SBC only.
• Avantree Relay — biggest strength: A 2-pack, so two travelers are covered, with aptX-Adaptive/Low Latency over Bluetooth 5.3, and you can keep using it while it charges.
• Avantree Relay — biggest trade-off: Around 20 hours of battery per charge — solid, but shorter than the Beeitzie — and no mention of the same safety certification list.
• Who each pick is for: Beeitzie Airplane suits the solo long-haul flyer who wants maximum runtime and top-tier codec support; Avantree Relay suits couples, families, or anyone who wants a backup dongle and doesn't want to pause when the battery runs low.
The Beeitzie Airplane (model B103) is built around one idea: get your own Bluetooth headphones working on any aircraft audio jack, with as little delay and fuss as possible. It runs Bluetooth 5.4 on a Qualcomm chip and supports both aptX-Adaptive and aptX-Low Latency, which is the combination you want for watching in-flight entertainment without lip-sync drift — provided your headphones actually support those codecs. The included dual 3.5mm adapter means it fits the two-prong jacks common on planes, and the same 3.5mm AUX input lets it pull audio from TVs, tablets, PCs, gym equipment, and car stereos, so it isn't a one-trip gadget.
Battery is where it pulls ahead. Beeitzie rates it at over 24 hours of working time, and a full charge takes about 2 hours over the included Type-C cable. It's also the more safety-forward of the two on paper: FCC, CE, RoHS, and BQB certifications, plus voltage endurance, overcurrent protection, and short-circuit protection. Controls are button-based with volume adjustment, and there's a dedicated RESET button for clearing up stubborn reconnection or compatibility problems — a small thing that matters when you're mid-flight and your earbuds refuse to pair.
Avantree Relay: Who It's For
The Avantree Relay takes a different angle: it's sold as a 2-pack, so you're effectively buying two airplane adapters in one go. For a couple flying together, or for one person who wants a spare in the carry-on, that's the whole pitch in a sentence. Like the Beeitzie, it works with anything that outputs audio over AUX — planes, TVs, gym equipment — and connects to essentially any Bluetooth headphones or earbuds, with a dual 3.5mm adapter included so it fits either style of airline jack.
On the audio side, the Relay supports aptX-Adaptive and aptX-Low Latency over Bluetooth 5.3. That's a step behind the Beeitzie's 5.4 on paper, though 5.3 is still a modern, stable spec and the practical difference for in-flight listening is minimal. Where the Relay is genuinely friendlier is around battery and feedback: it's rated up to 20 hours, and if it runs flat you can plug it in and keep listening while it charges — a real advantage on a long layover or a transatlantic flight where you don't want dead silence for the last hour.
The Relay also leans into usability. Built-in controls handle volume, pairing, reconnecting, clearing pairing history, and checking battery level, and LEDs let you see connection and battery status at a glance. Avantree explicitly frames the two-device connection as a "listen together" feature — share the audio with a friend while you fly. If you'd rather not squint at a manual or guess whether you're paired, the indicator-light approach is easier to live with.
Who should skip it? If you fly solo and care most about squeezing out every hour of runtime, the shorter battery spec is a point against it versus the Beeitzie. And if certification detail matters to you, Avantree's sheet doesn't list the same FCC/CE/RoHS/BQB lineup that Beeitzie does.
• Best for battery life → Beeitzie Airplane (over 24 hours vs. up to 20 hours).
• Best for two travelers at once → Avantree Relay (2-pack in the box; Beeitzie ships as a single unit).
• Best for the newest Bluetooth spec → Beeitzie Airplane (Bluetooth 5.4 vs. 5.3).
• Best for charging-while-listening → Avantree Relay (plug in and keep using it; Beeitzie's sheet doesn't state this).
• Best for simple status feedback → Avantree Relay (LED indicators for connection and battery).
• Best documented safety features → Beeitzie Airplane (FCC, CE, RoHS, BQB plus overcurrent and short-circuit protection).
• Best for a no-drama pairing reset → Beeitzie Airplane (dedicated RESET button).
• Best for a shared listen on one flight → either, with a caveat (both support two devices; Beeitzie drops to SBC in Dual Link mode).
In my opinion, Beeitzie Airplane is the one I'd buy for myself. The over-24-hour battery, Bluetooth 5.4, and the explicit safety and protection list make it the stronger single-traveler adapter, and the RESET button is exactly the kind of practical detail I want when something won't pair at 35,000 feet. I'd steer toward Avantree Relay instead if two of us were flying — the 2-pack plus charge-while-use is genuinely useful for a couple or a family. Either way, check the current price on Amazon before deciding, and confirm your headphones support aptX-Adaptive or aptX-Low Latency to actually get the low-latency benefit.
aptX Adaptive is a Qualcomm audio codec that dynamically adjusts between high-quality audio and low latency depending on what you're doing — ideal for video where you want both good sound and minimal lip-sync delay. "aptX Adaptive headphones" simply means headphones that support that codec, which is what lets a transmitter like the Beeitzie B103 or Avantree Relay deliver low-latency audio. If your headphones don't support it, both adapters fall back to standard codecs and you may notice delay.
Do I need aptX Adaptive for airplane movies?
Yes — both support connecting up to two headphones. Avantree highlights this as a "listen together" feature with LED guidance, while Beeitzie notes a trade-off: in Dual Link mode the audio format is limited to SBC only. So sharing works on both, but you give up the higher-quality aptX codec when you do.
Beeitzie Airplane is rated at over 24 hours of working time and charges in about 2 hours. Avantree Relay is rated up to 20 hours, but it can be used while charging, which partly offsets the shorter runtime. For pure endurance, Beeitzie wins; for flexibility when the battery dies, the Relay is the friendlier option.
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