Bluetooth V5.0 Transmitter & Adapter

I have been hunting down a low latency headset/transmitter combo for a while, as many others here. The hunt can get tricky because you have to pair the two devices that will agree to talk in low latency mode. So I took my quest rather seriously and I bought a bunch of headsets and transmitters. For reference, I call "slow" connections to those where you can see your video out of sync with your audio. 90 milliseconds or more in delay will do that. Similarly I call "fast" connections where audio and video are reasonably close or in sync, with the delay being 30 milliseconds or less. In my experience, AptX is a slow codec and the improved AptX-LL is fast. So then, any device that does not explicitly say AptX-LL or Low Latency will work slow; a device that only says "AptX" is not enough. And the wireless connection can only go as fast as the slower paired component so having either a slow headset or transmitter will make your sync slow. To make things more interesting, not every headset that does say AptX-LL will use low latency technology with every transmitter out there. You kinda have to mix and match. So for example a given transmitter will connect fast with a certain headset, but slow with some other brand. And it will do so consistently. Not so the TROND 2-in-1, however. Every headset I tried with this little device worked fast. The headsets include: Premium MS301 Mixcder Wireless & Wired V4.2 Bass Noise Isolation Headphones with aptX Low Latency Audio- Headset with Mic & Bluetooth - Sturdy Foldable - Universal Compatibility for iPhone Tablet PC Avantree Wireless Bluetooth Over Ear Headphones with Mic, LOW LATENCY Fast Audio aptX Headset for Gaming TV PC, 40h Battery Sound - Audition Pro [2 Years Warranty ] Miccus Wireless Bluetooth v4.2 Over Ear Headphones with Mic, aptX Headset Low Latency for Gaming, TV, iPhone, Beats, Foldable - 20h Battery (SR-71 Stealth) I tried other headsets, but those were not advertised as Low Latency and thus worked slow. Some notable headphones brands are falling behind the low latency race, surprisingly. Do not fret however, because you can still buy two of these devices, use one as transmitter and one as receiver, and just use your favorite wired headphones. Yes, low latency works quite well that way. You can pair two low latency headsets at the same time, but the low latency feature is disabled that way. It is the same on every low latency transmitter I have put my hands on. So if you are planning to do that, you can opt for cheaper, slower headsets. Aside from latency, these devices are well constructed, simple to use and most important of all, light and small. Single button operation; nice red and blue LED leaves nothing to guess. It behaves like any other standard BT device, nice and simple. It almost needs no instructions to set up. The fact that they are transmitter and receiver in the same package only adds to the versatility of this design. All in all, great little device. I do recommend it for your audio/video needs when paired with a compatible LL headset or other TROND 2-in-1.

I have been using the device now for over one month. I use it with my new LG V20 smartphone, which, as I understand, supports aptX technology. I use it only as a receiver, in receiver mode, in conjunction with my old Sony headphones. I noticed that by plugging in my headphones to the V20 jack, I was loosening the female connection inside the phone case - this was starting to result in connection noise. This was not a issue with this phone only ( V20 is two months old ), rather, it was an issue with my Samsung G S3 also. I suspect it is an issue with most smartphones with slim case widths - in that there simply isn't enough room to support the mechanical foundation to allow for a female receptor that can withstand repeated insertion and removals. And yes, there is ( in the case of the V20 ) a subtle but noticeable slight " click " when the headphone jack is inserted into the V20, fully. Well, must say, the TROND device works great to this point - just as the instructions explain. The audio is wonderful, volume is adjusted by the up/down buttons on the phone side AND the TROND works with a USB charging cable plugged in all the time. I used the TROND several times at first, without keeping the USB charging cable plugged in. With intermittent device use, was having to recharge TROND after two days usage. TROND is so small and lite, it is amazing that it does all the functionality as claimed ( again, receive mode usage with a V20 ). For the price, this is THE route to go IF you want to use your existing headphones ( not Bluetooth, rather cable and male jack ) AND your phone supports aptX. I wonder if TROND would consider an even newer model with increased battery life, even if it meant the device would grow in physical size OR, perhaps a super TROND that could act as battery backup for a cell device as well as supporting all the existing functionality ?

For what this little device is, it works pretty well. I have been using it for a few days as a way to listen to my records while I work in my office which is in the room next to my nice stereo & turntable. The battery life has been good (states 8-10 hrs...it's doing that), it paired up with my BT headphones without too much issues, and has good sound quality (wired will always do a bit better, but this one is pretty close to wired). There are multiple audio connectors in the box which is helpful for different ways to hook it up. The main negatives are #1 range - they say "30 ft", but quite a few BT devices aren't that good, and this one is about the same...the distance I am using it is no more than 15' and unobstructed. 99% of the time it's fine, but does cut out once in a while. It is very small, so the antenna on it is super small, and I am sure that doesn't help. Second, if you want to use this as a dual device (two headphones connecting), the low latency aptX codec does not work...it works with 1 headphone, but if you pair 2 it will go back down to the slower codecs. They have a different version that can do low latency with two headphones. I also am not a fan of multi-use single button....the one button turns in on, turns on/off pairing, etc, etc. You have to know how long to hold it to pair one headphone, two headphones, turning it on/off, resetting, etc. I always get confused. But I am ok with admitting it could just be me and everyone else is ok with it. It is a good solid BT Tx/Rx device, and will work great with incorporating BT with my older stereo equipment. I have amps from the 1970s, and this is a nice way to add some of the modern day functionality to these great amps so I can use cordless headphones and stream to them. If your wanting dual headphone low latency, higher range, or need inputs like optical, then look at their other products (they have higher end units that can handle extra inputs or headphones). For the price, it is doing the job that I intended it to do, so no real complaints.

My family needed a product to connect 2 bluetooth headphones with my iPad and phone, so my daughter and son could watch the same programs during travel without any lags. Product arrived on time with a good packaging and tried connecting both bluetooth headphones without any problem. User guide is very clear With step by step instructions and the product is very user friendly. I had face a minor problem next day and that was easily fixed by involving the product support team and thanks to them for a quick turnaround. The product was not turning on and didn’t turn off and would not pair to the devices, so I reached the technical support and received an response immediately with the serious instructions to isolate the issue and to fix it as it is very clear so that a lay man can easily understand the steps to perform. After that minor glitch I didn’t faced any issues till now as it work great. I really enjoyed this product as they advertised and I won’t hesitate to recommend to my friends and relatives as well as I think it is very reliable product. Thanks to Trond.

So everything about this works/sounds great. My wife and I are using this with two pairs of Apple AirPods. Sync is pretty good, a little bit of latency, but usually not a problem. But here is a problem: If you're watching TV/Movies and it gets to a quiet part of a scene, the audio will cut out until something loud happens! Totally destroying the moment and taking you out of the film because all background sound cuts out too (birds, wind, etc.). Support was helpful and even sent me a replacement, but it's a problem with the technology in the device so the problem was the same. Again, support was great and checked in and gave me a refund when I told them the problem was still present. So five stars for support! If you only watch loud action films like "Transformers" or something, you may not even notice! On "MIP Fallout" it rarely happened. One tip I learned from support that may or may not work for you (it did not work for me because I'm using AirPods): If you turn your device that you're playing/streaming video from up really loud (maybe 3/4) and then turn the output down (if possible) on your headphones then that will keep the audio from cutting out. But if you can't turn it down (like me) it's not an option. If they figure out how to fix this issue, I'll be back for BT DUO 6.0!

3rd update Mar 20, 2019: Updating my previous, original 2-star rating to 5 stars thanks to their support given and a fully functional replacement device in ~2 weeks. --- TL;DR --- My initial experience from Sep 2018 with my DUO was mixed. I didn't contacted support, and wrote my first “quick review” on Dec 2018 or Jan 2019. On Feb 2019 I got contacted by a person from support because my review. Since then, the support person 'greatly explained' the causes of the issue and guided through the process for getting a warranty device. I'm very placed with the detailed support given by him, and new replacement device works great! --- Device --- My issue from Sep 2018 while RX mode was indeed a defect on some units on the Amazon warehouse from that period, which occurred in any codec (SBC, aptX and aptX LL). The TX “issue” of audio fading/cutting on low volume (e.g. while playing on Nintendo Switch on low noise scenes), is normal. One must turn all the volume up on the audio source so the device can capture it, as the chip isn’t an amplifier but just a transmitter. Due the RX issue, I was offered replacement device. Decided to try and upgrade to the Trond DUO S. Now I can confirm the intended correct functionality of RX/TX on both devices (DUO and DUO S), and confirmed the RX firmware defect. Additionally, I could test pairing a DUO with a DUO S. They work amazing on aptX LL (Low Latency) which is selected automatically as it’s the best codec available on both. You can easily see and hear the difference between the standard SBC and aptX LL, the latter feeling instantaneous on audio visual feedbacks. After 5 months of use and having a fully functional unit... Re-viewed PROS: - Compact goodness. - Good battery duration, easy charging, and can be left connected. - Easy pairing, even multiple pairing (after you get the “trick” for pairing). - Lot of adapters included. - Long satisfaction warranty (18 months) and great support service. Re-viewed CONS: - No configurable low-battery audio signal. It can confuse you from phone alerts, etc. - No configurable LED. --- Support and warranty --- They are serious on their support area, as they followed me up some time latter from my original 2 stars Amazon review on all my emails until I got the issue solved (on my case a warranty applied, until I had it on my hands, even though it would need a global shipment). They DO respect their “18-MONTH TROND warranty” additionally from the Amazon return period, so you can buy with confidence that any defect will be followed quickly and in great detail. This was getting replied the next day and getting detailed explanations of the cause(s) of my issue along with the possible actions to take. Big thumbs up for Trond. They managed to stand up with the pesky support processes of many other bigger companies out there. --- MISC --- My only complaint could be their webpage. Before making my original purchase, I looked up their website and it feels empty and outdated, like if they didn’t exist nor could give any kind of quality support in case you got into issues. They deserve a newer and better site that shows and highlights their great client support. ------------------------------- 2nd update Feb 22, 2019: Their customer service contacted me regarding the issues I mentioned here, trying to help me with them by proposing a replacement thanks the 18-month warranty. I will try keep updating this review accordingly. ------------------------ 1st Original review: Has been some time that I got this (Sep. 2018) and have been postponing a quick review, some thoughts on this device. I have used a few times on various scenarios (playing on Nintendo Switch, video watching, etc., with different headphones as receivers, and different controlled sources as high end phones and laptops). Personal cons: - 1 issue as a receiver. The device is identified as apt-X on my phones, but the output audio is awful, sounds muffled, as phone call quality on all devices that I tried. This reaches the point that the Windows 10 "bells sound" sound test gets very pitchy and gets highly distorted and the very end of the last bells. I would like to provide an example of this by recording the output from the Trond when used as receiver. - 1 issue when transmitting. When transmitting, the quality is pretty good, BUT, when having low volume sounds coming from the audio source, the Trond seems to "fade" or cut-out the audio. Playing games on the Nintendo Switch is not enjoyable with some games that have some low-volume scenes, since those are intermittently faded or cutted-out. There is no noticeable delay at least from what I can tell (but at this point I just stopped using the Trond both as receiver and transmitter). (As I said, the quality is great when transmitting, but not sure if it's real aptX quality grade, my headphones don't have any indicators of what protocol is being used when receiving audio from the Trond when it's transmitting, neither Windows helps with this). Pros: - Super compact, portable. - Portable power of ~6 hrs or more. - Quicker setup as receiver. - Can be used always connected Note that I probably got a defective device but.... Anyways, I stopped using it since then (Sep. 2018). It has just a couple of days of usage. Recently I got the time use it again but as a background music receiver, as the previously mentioned issues are just annoying. The receiver sound quality is the dealbreaker for me. Maybe is normal for the price, just the aptX is there for the short delay feature of the protocol.

I tried close to 10 of these bluetooth devices. Some of them were ok. Some were terrible. This one had a few peers in quality but not in size and price. This thing is tiny. I use it in my car. See pics attached. It's size is unobtrusive and hardly noticeable and works real well where I've mounted it. Which is right next to my aux input and cigarette lighter jack. I bought a short (6") USB 2.0 A Male to Micro B USB cable (https://smile.amazon.com/dp/B013G4EAEI). It comes with a similar length aux cable. And together it creates a nice little setup that no ones really notices. I mounted it so that you can somewhat see the single button on the device. That button lights blue/red when you put it into pairing mode (holding the button for about 5 seconds). That button is so flush with the device you really can't feel it or know when you are actually depressing it. So it's important to be able to see when the color changes to the blue/red almost purple color. That means it's ready to connect with your phone. And yes, you have to reconnect to it every time you get back in the car. Which is the only unfortunate "feature" about it. But I didn't find a single bluetooth device that would auto-reconnect after losing power in the car. Actually it doesn't even lose power because it stays connected to the cigarette lighter power. But the device turns itself off. So when I get back in the car I have to hold the hard-to-feel button for about 5-6 seconds and then my phone connects on its own. Unless someone else was last connected to the bluetooth device then sometimes I have to go into my bluetooth setting (I'm using an iPhone) and tell it to reconnect. But that is not often. And it doesn't have to stay connected to the power in the car but for me there is no sense to ever have it unconnected. So it just stays "charging" all of the time. Overall it's a nice little quality piece of tech. I chose it over a bunch or more expensive units (and some cheaper ones). Don't hesitate to buy it if you need simple and solid.

I am using this little device to connect my Nintendo Switch with Sony WH-1000XM2 headphones. I have it powered via a USB power adapter so cannot speak as to the advertised battery life. Works very well with no noticeable latency, and the sound quality is pretty much as good as my corded Sony MDR-1R when plugged in via an amp (my previous Switch setup). One thing to note is make sure you turn on your bluetooth device/headphones before turning on the TROND, if you do not you will have to go through re-pairing as it seems to lose pairing if you turn the TROND on first. I had an idea to order another of these to use with my electric Violin, but alas after trying it the latency is way too high to use with something like an instrument. I don't know if this is because of the Violin itself because as mentioned the Switch sound has no noticeable delay. Not a knock against this device as this is not what it was designed for but thought I would mention it in case you were considering one for this purpose. Comes with everything you need to get started, though I caution against using the USB cable with a USB wall adapter (such as your phone one, in my case a Samsung charger). When doing this there was a large amount of static heard through the TROND. I solved this by using a dedicated USB power brick, an Amazon Kindle charger. All in all a great device, very small (about 1 1/2"X1"X1/4"), and has the added feature of being a receiver as well if I ever has a use case for that scenario. Recommended!

Es muy bueno , funciona de maravilla y si trabaja bien entregando sonido estereofonico , funciona mejor que el anterior que compre

Great Product no lag

I purchased this great little product to transmit music etc to my Sony 900 h-ear wireless headphones from my older stereo equipment. The service and after sales communication I have received from this supplier has been exceptional. Once paired with my headphones the process does not need to be repeated. Firstly switch on the headphones, then turn on the transmitter. Literally within seconds the pairing takes place automatically and the sound quality is astoundingly good, much better in fact than what comes out of my freestanding speakers. I live in a large bungalow and all internal walls are of solid construction so I was initially disappointed that the bluetooth only worked within the room the transmitter was in. HOWEVER, I purchased an inexpensive male to female, 5 meter extension cable from G-Shield and plugged the Trond into it. I only need to place the Trond still inside but nearer to the door of the same room, and I am able to get a perfect bluetooth connection in almost every room of my house with no loss of sound quality whatsoever. Only one room at the extreme end of the bungalow produces a slight crackle in sound. The connection even extends for quite a distance into my attached garage. I do not use it in reciever mode so cannot comment on this but, given that it very competently meets my requirements, I am delighted with this little device and what it achieves. Considering the excellent after sales service and the initial guarantee it really is worth a try. I am therefore very happy to recommend this product.

Si collega facilmente (es. TV) e rileva in pochi secondi altri apparati via bluethooth (es. cuffie) con impiego per diverse ore. Prestazioni eccellenti. Spedizione velocissima.-

Bonjour Je recherchais pour mon Vidéoprojecteur (non bluetooth) la possibilité de transmettre le son sur mon casque sans fil, pour ne pas déranger les autres. Le transmetteur branché sur la sortie OUT jack 3.5, transforme la sortie son en Bluetooth. La connexion au casque s'est effectuée à la 1ere synchronisation. Pas de décalage de son, parfait. Cable usb alimentation branché en direct sur le port alim du vidéoprojecteur, aucun grésillement. En fin d'utilisation, aucune manipulation a faire, s'éteint tout seul avec le vidéoprojecteur. Pas besoin de refaire l'appareillage sur les utilisations suivantes. Je conseille pour ceux qui veulent rendre leur vidéoprojecteur Bluetooth pour envoyer le son sur un casque sans fil. Merci