How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a versatile, codec-flexible transmitter that turns almost any USB-C or wired source into a high-resolution Bluetooth feed, choose eppfun Le Audio USB; if you need a travel-first adapter built specifically for in-flight entertainment and sharing audio with a seatmate, choose Blue Air Airplane.
Both devices do the same basic job — they take audio from a source that has no Bluetooth and broadcast it to your wireless headphones. But they were clearly designed for two different owners. The eppfun unit is a spec-heavy, multi-codec transmitter aimed at gamers, PC users and anyone chasing aptX Adaptive and lossless-quality audio. The Blue Air unit is a compact, battery-powered dongle that lives in a carry-on and solves one problem extremely well: getting your own headphones working on a plane's 3.5mm jack. The aptx adaptive headphones angle is where these two overlap most, and it's the fastest way to tell them apart.
• eppfun Le Audio USB — biggest strength: Qualcomm 5181 chip with Bluetooth 5.4 and a wide codec menu (LDAC, aptX, aptX Adaptive, aptX Lossless, aptX LL, SBC, LC3), plus Auracast broadcast to 100+ receivers.
• eppfun Le Audio USB — biggest trade-off: It's a transmitter that draws from your source, it has no onboard battery and no display, and every advanced codec only works if your headphones support the same standard.
• Blue Air Airplane — biggest strength: Purpose-built for travel with a 30-hour battery, USB-C recharge in about 1.5 hours, an OLED screen showing battery/volume/codec, and dual-headphone sharing.
• Blue Air Airplane — biggest trade-off: It's a 3.5mm aux transmitter first and foremost, so it's less useful as a permanent desktop or console solution, and its Bluetooth version is 5.3 rather than 5.4.
• Pick eppfun Le Audio USB if you want one transmitter for PC, PS5, Switch, phone or laptop and you care about aptX Adaptive, LDAC and Auracast.
• Pick Blue Air Airplane if you mainly want wireless audio on flights and want to share a movie with the person next to you.
The eppfun Le Audio USB is the more technically ambitious of the two. Its headline is the Qualcomm 5181 chipset and Bluetooth 5.4, which the spec sheet frames as more stable, faster and longer-range than older Bluetooth generations. Around that sits an unusually broad codec list: LDAC, aptX, aptX Adaptive, aptX Lossless, aptX Low Latency, SBC and LC3. There's also a status LED system that shows which mode is active, so you can confirm at a glance what you're transmitting.
Who should buy it: gamers and desktop users who want low-latency aptX LL for shooters, PC owners who want to send high-resolution audio to wireless headphones, and anyone curious about Auracast multi-listener audio. Who should skip it: travelers who need something self-powered and pocketable, and anyone whose headphones only support SBC — you'd be paying for codec support you can't use. Note too that there's no battery here and no plug; it runs off the connected source. The one-year warranty is listed as the coverage.
Blue Air Airplane: Who It's For
The Blue Air Airplane adapter is a specialist, and it's honest about it. The whole design centers on the 3.5mm aux jack — the kind you find on airplane seat-back entertainment systems, older TVs and some home theatre gear. Plug it in, pair your headphones, and you've turned a wired seat-back screen into a wireless one. It supports two Bluetooth headphones at once, so you and a travel companion can watch the same movie without splitting a headset or passing earbuds back and forth.
The details that matter for long-haul travel are all here. Battery life is rated at 30 hours, which covers coast-to-coast and transatlantic routes comfortably, and a full charge takes about 1.5 hours over USB-C. There's an auto power-off to stop it draining in your bag. The OLED display is the standout feature you won't find on most budget adapters — it shows battery level, volume and the active codec (SBC, aptX HD, LL or AD) in real time, and there's onboard push-button volume control so you don't have to reach for your phone or tablet mid-flight.
On codecs, it covers aptX Adaptive, aptX HD and aptX Low Latency, with the last one aimed squarely at lip-sync accuracy for movies. It's rated for 10 meters of Bluetooth range, which is plenty inside a cabin or a living room. The body is plastic, black, and small — roughly 2.32 by 1.38 by 0.59 inches — so it disappears into a seat pocket.
Side-by-Side: Which Should You Choose?
• Best for flights and travel → Blue Air Airplane. The 30-hour battery, 1.5-hour charge and 3.5mm-first design exist for exactly this.
• Best for PC, PS5 and Switch gaming → eppfun Le Audio USB. Driver-free support across Windows, Linux, macOS, Android, Switch and PS5, plus aptX LL for low latency.
• Best for sharing audio with one companion → Blue Air Airplane. Dual-link lets two pairs of headphones listen to the same source.
• Best for sharing audio with a crowd → eppfun Le Audio USB. Auracast broadcast mode is built for many receivers at once, not just two.
• Best for high-resolution codec variety → eppfun Le Audio USB. LDAC, aptX Lossless, aptX Adaptive and LC3 give it the widest menu, with aptX Adaptive reaching 96kHz/24-bit.
• Best for knowing what's happening at a glance → Blue Air Airplane. The OLED screen shows battery, volume and codec in real time; eppfun relies on status LEDs.
• Best for set-and-forget desk setups → eppfun Le Audio USB. No battery to charge, because it's powered by the host device.
• Best for plug-and-play simplicity on a plane → Blue Air Airplane. Plug, pair, watch — no app, no driver, no fuss.
If I had to pick one, I'd buy the eppfun Le Audio USB — but only because my setup leans desktop and console. Its codec range, Bluetooth 5.4, driver-free compatibility and Auracast broadcasting make it the more capable device across more of my daily use, and it's the stronger match for anyone who owns aptx adaptive headphones and wants to actually use that codec. That said, if your real problem is "my AirPods won't connect to the plane screen," the Blue Air Airplane is the better answer, and it's the one I'd hand to a frequent flyer without hesitation. Different jobs, different winners.
FAQ
what is aptx adaptive headphones
Yes — the spec sheet lists AirPods among the standard Bluetooth headphones it works with, including noise-canceling models. You pair your AirPods to the adapter and plug the adapter into the 3.5mm jack. Note that AirPods don't support aptX, so they'll fall back to the standard SBC codec.
The Blue Air Airplane supports dual-link, so two pairs of Bluetooth headphones or earbuds can listen simultaneously — useful for couples or family trips. The eppfun Le Audio USB instead offers Auracast broadcast mode, which supports many receivers at once rather than just a pair.
The Blue Air Airplane is rated for up to 30 hours of use and recharges over USB-C in about 1.5 hours, with auto power-off to save charge when idle. The eppfun Le Audio USB has no onboard battery at all — it draws power from the device it's plugged into, so there's nothing to charge.
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.
See also: EarFun Air Pro 3 vs Yamaha YH-L500A: APTX Adaptive, Lusgawer Airplane Adapter vs Generic USB, HomeSpot KR10C vs Asobilor USB-C Audio Cable