BTR11 Bluetooth 5.3 Receiver LDAC 3.5mm Wireless Audio Headphone Amplifier Adapter (White)

Fantastic product for wired headphones. This increases older headphones or wired audiophile headphones compatiblility. You can use them in more places. I use this with KPH30i and Koss Portapro and Bose SoundTrue II wired headphones from decade ago. This way when the battery of this device break eventually in number of years I don't have to just buy whole new set of headphones. I can just get this! The Range is impressive and mic is good. I work at a call center and use my Koss portapro wired with these on a laptop and iPhone at the same time. Dual connection works great. Optionally this FiiO product gets software updates with the iPhone or android fido app. The latest update is supposed to fix (4-2026) is supposed to fix the volume sensitivity so that the lowest volume can be lower. Definitely worth the 20 bucks and it's from an Audiophile brand you know is going to give you good quality for the price. I mean LDAC for 20 bucks! Very nice a small and easy to use controls on any wired headphones with 3.5mm jack add basically add mic to headphones without one too. Great LDAC quality sound.

So, I’ve had this for a day. As usual, I always read all the 1 star reviews before I buy anything. It can point out potential weak spots in an item, and it can be amusing, too! Anyway, I received the product, and as so often happens, I was pleasantly surprised by the overall quality of this product, which left me scratching my head over some of the negative reviews. It was smaller than I expected, about the size of my pinky finger and a little wider. Tiny! The headphone jack fit is very tight and secure. It seats as it should. The USB-C port fit is tight and secure, and my cable clicked into place solidly when I charged the device. The button feel is solid and operationally works as advertised. The pocket clip could be beefier (as some other reviewers noted), especially as this unit is so tiny and light. But even with that being said, the headphone jack plugs in so securely that even if this thing falls out of a pocket, it’s not going anywhere unless you step on it. That probably wouldn’t do it any good, lol. But no way would it become detached from the headphones. Pairing was super quick and reliablewith the 3 devices I tried it on. The led indicator shows when it’s in pairing mode, the charge state and the selected bluetooth codec used. I ran it for 3 straight hours right out of the box without charging, then I charged it to full. During that time, no glitches, disconnects or other interference at all. I haven’t yet tested how far the Bluetooth range limit is, but during my initial test I got about 50 feet away from my transmitting device without any dropouts. I think the sound quality is better than a couple similar older devices I have, and I thought those sounded fine. For what it is and the price point, I’m very happy! For reference, my listening tests are using the LDAC codec transmitting from a Hi-Rez audio player through Focal studio headphones. The unit received and processed the LDAC codec as shown by it’s LED display. I am an audio engineer and a recording studio owner. I also do electronic repair. I point this out because I am a “trained” listener, and I have access to some very high-end audio equipment to compare to. So, while this doesn’t sound as good as when my ridiculously expensive studio headphones are plugged direct into my mastering grade headphone amp in the studio, I don’t expect it to. But I do get a very pleasant, high fidelity listening experience with no background noise that I can discern. Of course, overall reliability, reliability of the Bluetooth connection, battery life and overall product life are still in the “who knows” stage, and these are some of the things pointed out by the negative reviews. As always, I’ll amend this review if something changes. But hell, for the price, the technology blows me away. The sound quality blows me away. Even the build quality is acceptably solid from what I can initially tell.

This little device is great! It works very well for music with my in-ear monitors. I used it with the KZ S10 Pro and the cable that came with them. Sound quality is great, good highs and lows, latency is low, so no major delay in the sound while watching videos. Buttons are responsive, if a little squishy. Battery life is also pretty good. I was able to make it through my 8-10 hour work day without having to charge the unit. There are two cons to this device, though. 1: The microphone is awful. Do not try to use this for taking calls. The person on the other end either will not be able to hear what is being said, or, if they can hear that SOMETHING is being said, they most likely will not be able to understand. The few calls that I did take using the device were not good. I was told it souded like I was shouting to them from the other end of a very long hallway, or that I had them on speakerphone and was very far away from my phone. The device was clipped to my collar directly under my mouth. I feel that there should have been no issues hearing and understanding me at that small distance. 2: The clip on the back is cheap plastic and will not hold up to even regular use for very long. I was able to take this to work with it clipped to either the collar of my shirt or clipped to my pocket for about a month before the plastic bracket snapped. This isn't an expensive device, and I understand that cheap is cheap, but I expected a bit better out of the clip. Overall, it's a good value for the price, as LDAC headphone adapters are usually expensive items, and the sound is great. Just don't expect it to be able to take any sort of abuse.

Great quality product. Nice and small, has a clip, and has a decent range for connections. The battery is alright, usually lasting about 6-8 hours of listening. It has 3 buttons and plays loud enough that usually it doesn't need to be maxed out.

Great little amp for the price. Clean, clear sound overall. Of course, you can find better, but this is very pleasant with my Phillips SHP9600. That headphone has a removable cord with 3.5mm plug, so all you need is an 8" patch cord and a rubber or velcro band for the clip, and you have great open wireless headphones with an easy upgrade path. While switching codecs in Android dev options, I can hear the improvement of LDAC. You can hear the difference between Lossless and Hi-Res Lossless. It's no ess chip, but still better than many bluetooth headphones. Be sure to set your LDAC dev options to 'Optimize for Quality'. A Samsung phone will allow you to make a shortcut to this setting using Search. Important because Android always sets LDAC to 'Adaptive' every time you connect, which can limit quality. It's an old bug they may never fix. If you're familiar with fiio, this is consistent with their usual commitment to great sound quality for the money, with a simplicity-done-right design. For the price, it earns 5 stars. In a dark room, I wish you could disable the blinking light. This still achieves my goal: quality wireless open-backed headphones. I like my pre-made wireless headphones, but nobody makes an open-backed wireless headphone, so this is still the best solution, especially if you collect and modify wired headphones.

Works so well! I never really liked the idea of Bluetooth iems and they're really uncomfortable for me that i cant wear them long so i only really use wired iems for workouts so i love that you can turn ANY wired headphones or speakers into Bluetooth with this. Paired it with my hd599 and can use them all day no problem. It definitely beats any of the cheap dongle style dac/amp in terms of flexibility or convenience. Clarity is very close to wired direct and it plays louder than the apple usbc/3.5 jack also the dac/amp with the cx31993/max97220 chip combo when played from my iPhone (iPad can go too loud no matter what i use)…another thing about the dongle style dac/amp that i hate is that it will stop the song if the usbc connection jiggles a little too much and it does it at an annoying rate…this doesn't even cut out when im in other rooms and away from my device. This little thing makes it feel like I'm using a iPod shuffle again…I love it!

Update: Initially I gave it 4/5 but I've revised it to 2/5 because I am tired of having to reconnect it (which is a tedious process). Having owned this for a few months, I think the fatal flaw of this device is the way it is programmed: when disconnected it waits for ~1 min before it begins to look for a new device and goes into pairing mode. When this happens, thereafter it will not reconnect smoothly with my pc and I have to start over, forget device, trust, pair, run the bt-device command below... This is why I noticed in my review below, I didn't have problems so long as I turned the fiio off before turning my laptop off - but yeah, I don't always remember and I'm tired of it. As far as I know, this is not normal behavior for a bluetooth device and bad design on Fiio's part. Fiio if you're reading this, I don't think this is too hard to fix for a ver 2.0 of this product. I wouldn't mind a dedicated "connect" button for pairing too. Original review: This is a nice and inexpensive wireless receiver. Sound quality is good. Range is ok. Battery life is decent - and I like that I can plug it into charge while I am using it. I am using this with laptop with Linux Mint 22.1, realtek bluetooth 5.3. Initially it wouldn't connect to my computer, I had to do the following for it to work for me: 1) In your bluetooth manager (blueman-manager): search for it, pair with it, trust it. (maybe it works for you after this step, in which case you're done) 2) Install bluez-tools: "sudo apt-get install bluez-tools" 3) Use "bt-device -l" to find its mac address OR right click it in blueman and choose "info" to get it 4) Now type: "bt-device -c 00:00:00:00:00:00" (put your mac address instead of 00:00.....) 5) In my case, after step 4 it asked yes/no about a passkey, just type "y" (see photo) I have had to remove/forget the device a few times and repeat these steps to get it working again. Seems to me the issue is related to whether or not I shut the laptop off without turning off this receiver first. So long as I turn it off before turning the laptop off, it comes back no problem. While I know Linux's poor bluetooth handling is partly to blame, I have other bluetooth devices that never skip a beat in terms of connecting 100% of the time.

When this thing works, it really works. I bought it wanting a cheap Bluetooth Reciever for my IEMs. A few months after getting it my monitors started acting up. The right ear piece would go out and no matter what I couldn't get it to work. It was like the volume for it was 30% of what it should be. It looked like the connector on the IEM was damaged so I bought a new pair. A couple months later and the same issue happened, with the same ear. I tried replacing the cable for both sets and that didn't solve the issue. Eventually I tries the IEMs on my home setup, connectting them straight to my DAC on my PC. Both sets of IEMs ran fine without issue. So my only assumption is that something with this device is faulty. That being said, when it did work it was amazing. It had some of the strongest connections I have ever seen from Bluetooth and the sound quality was great. I just can't justify buying a new one of these though. The feature set is extremely limited and I worry about the same issue appearing with another one.

Ok I went budget end as first time buying one if these. I had low expected tbh - but can say I am very surprised at how brilliant it is! It's tiny, and clips on easily to clothes. Very easy to set up and use. Super simple. Sound quality is better than I expected - though I'm no audiphole. I use this for podcasts and youtube, talking not music. Recommend!

Ottimo prodotto e ottimo venditore. Consigliati entrambi

Sound quality is excellent It's nice and loud How many problem is it doesn't always repair when it has to find the Bluetooth device and Range and it doesn't switch itself on when you plug it into USB c. I had a ugreen device before and I will be buying one of those again although I don't hate this

Nice little gadget. Very useful. Sound quality also good. 4.5k price shall be reasonable. 5k and Above not justified.

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