

✈️ Elevate your in-flight audio game—wireless freedom at 35,000 feet!
The Avantree Relay is a premium Bluetooth transmitter designed specifically for airplane entertainment systems. Featuring an advanced Qualcomm aptX Adaptive chipset, it supports simultaneous connection of two Bluetooth headphones, delivering high-definition audio with minimal latency. With up to 25 hours of battery life and a simple 3.5mm AUX plug, it transforms wired in-flight audio into a seamless wireless experience, perfect for frequent travelers and audiophiles alike.














| ASIN | B0C3QQ4X6F |
| Best Sellers Rank | #1 in MP3 Player Bluetooth Transmitters |
| Brand | Avantree |
| Color | 1-Black |
| Compatible Devices | Bluetooth headphones or earbuds |
| Customer Reviews | 4.4 4.4 out of 5 stars (5,781) |
| Data Link Protocol | Bluetooth |
| Hardware Interface | Bluetooth |
| Manufacturer | Avantree |
| Mfr Part Number | BTTC-218 |
| Model Number | BTTC-218 |
| Unit Count | 1.0 Count |
| Warranty Description | Warranty - 12 months (extend to 24 months with product registration) | Extensive Support: Chat, Email, Phone, Online Clinic, Video Tutorials, FAQ and Registration - avantree.com/support |
A**L
Ideal for flying with bluetooth headphones; a well thought out product
Why did I buy this product? Because I make international flights on a regular basis. For travel, noise canceling headphones are a must-have, but most are now bluetooth. Unfortunately, most cattle class seats have infotainment systems that only provide mini-jack outputs. Enter this device as the perfect solution! At least in my opinion. This device allows me to plug-in to the output jack on an aircraft without the inconvenience of wires. It has several domestic uses, specifically provided a bluetooth interface to older audio equipment, PC's that don't have bluetooth, and (some) tablets. Does it work? Yes, no reservations. Fully charged, the battery was only 50% drained at the end of a 10 hour flight to London from Phoenix, AZ. I used this device in conjunction with my iPad mini, the aircraft infotainment system and even my PC at home. Binding was fast and effortless. Recommend you read the instructions because although binding and unbinding is easy (and works) the unit itself has a minimum of controls and you need to know what you're doing! I really can't speak to quality or range, but at least up to around ten to fifteen feet it was working fine, and sound quality was excellent without drop-out or interference. Can I listen to music while the unit is attached to a charger? Yes you can. This was a worry for me, especially since I forgot to recharge before the return trip. So I attached to a USB-C power bank and absolutely no problem, throughout charging, the unit worked fine. BTW, many airlines seem to be banning the use of power banks on or onto their aircraft - just another nuisance to check on before you fly! Do I know how much power is left? Yes, there are 4 white LED's which tell you how much charge you've got on the device. The top-most illuminated LED flashes until the next level is reached or the unit is fully charged. Finally, can two people listen to the same audio? Yes, my wife and I watched a video on the plane, with both of us wearing Bose NC headphones in bluetooth mode. The unit provides two, simultaneous links so for me that was the final box ticked. Some widgets are hard to use, but this one is well thought out and easy.
J**N
Great price, portable, and easy to use
It supplies blue tooth for 22 hours on a full charge. Works great and easy to use. Highly portable. Great product at a great price. USB charging is fast. Any electronic sound device with standard mini headphone jack will work. I used an adapter for the old style headphone jack.
W**R
Great adapter.
This thing is super convenient, easy to pair with, has surprisingly good range, a good battery life, is small and convenient, and sounds great too. Got no static or anything. My only relatively small complaint is you can't unpair one of your connections without disturbing the other (as far as I know). You can only unpair both connections or just turn it off long enough to pair to something else. It's not big enough if an issue to be worth dropping a star over, but I thought I'd mention it.
J**M
Generally good performance
This pairs well with most devices, but had problems with Bose QC earbuds. Latency is the lowest I have encountered with the right earbuds, but varies with others that are supposed to be ultra low latency. Battery life is around 15 hours between charges. Sounds quality is good.
B**M
Works perfectly for downloaded movies on laptops for long flights
This relay works great with our laptops! The instructions were concise, clear, and both sets of our ear buds were very easy to pair and use with it. We can now watch our downloaded movies on our flights with each of us having our own set of earbuds instead of having to share one set, lol. We especially appreciated how the instructions boldly point out to turn off our phone Bluetooth during pairing because that causes 90% of problems...sure enough, that instantly worked. We also like the included charging cable, plane adaptor and sturdy zippered carrying case.
M**T
Great
Used this on my flight to Japan and it works very well. No more having to use their headphones, now with this you can use your own. Easy set up, easy to use and compact so you can toss it in your pocket. 10/10 overall
A**E
Doesn't work as promised
In spite of the description, it never worked with 2 airpods simultaneously. It would work with one or the other, but never both. Wasted a whole day trying to get it to work. Sent it back.
C**A
Very good and almost perfect
Connectivity through my TV remote is excellent with no noticeable lag. Sound quality is excellent, battery life is also very good and can be supplemented with a USB power pack for near continuous operation. My only complaint is gain: while the volume is adequate it's barely adequate. I don't understand the gain structure to know whether it can be increased and my hearing acuity might be a part of the problem others might not have. All that said it does what it's supposed to do, lets me watch TV without bothering my wife, and I would happily buy it again.
T**U
Der Adapter kam sehr gut verpackt an. Die Einrichtung und die Verbindung mit den Kopfhörern ging sehr fix. Zudem ist die Anleitung auch verständlich. Im Flugzeug konnten wir den Adapter testen. Ergebnis einfach sehr gut. Akku hält lange, Übertragung ohne Verzögerung und in guter Qualität. Das verbinden weiterer Kopfhörer auch einfach. Zudem kann man zwei Kopfhörer sogar gleichzeitig nutzen. Für den Preis super. Vor allem kann man es ja auch außerhalb vom Flugzeug nutzen. Definitiv klare Kaufempfehlung
C**R
Bought it for a recent long airplane ride from Dubai to Canada. Was Flying on ITA Airways. Didn't need to use because ITA allows direct bluetooth connection, but I tested it on my laptop and it worked as stated. Only problem is trying to remember the directions to connect/pair since I don't use it very often.
M**A
muy buena compra, justo lo que necesitaba.
R**A
Perfect for aeroplane journeys. Works really well and strong Bluetooth connection.
無**名
2026年2月に購入し、10回ほど使用してますが、1度音声が聞こえなくなったものの再起動させたらすぐに直りました。 携帯のしやすさ、接続性ともに満足ですし、 出勤時、在宅勤務等でのTeams会議でとても重宝しています。(スマホ等でもTeams参加できますが、画面共有等で不便) まだ利用したことはないですが、機内での利用も楽しみです。
Trustpilot
2 weeks ago
3 days ago