TROND Bluetooth V5.0 Transmitter Receiver for TV PC iPod, 2-in-1 Wireless 3.5mm Adapter (AptX Low Latency, Pair with 2 Bluetooth Headphones Simultaneously), Black

I purchased the Trond BT-DUO to use with a 13 year old Toshiba flat screen TV and a set of 8 year old Nokia BT (noise-reducing) headphones, something Nokia doesn't even offer anymore. I am happy to report the Trond in transmit (TX) mode paired immediately with the Nokia head phones. Once hooked up to the TV, I find I am getting excellent audio with no break up or noticeable voice lag. Turning on the head phones is all it takes to reconnect the BT link. I'm keeping the Trond powered via the supplied USB cable, so I can't comment on the Trond's battery life. I also am not using it in receive (RX) mode. The manual describes the procedure for pairing a second device to allow two users to access the same feed, but I have no way to test that. If you are wondering, I'm still using the TV because it still works well and has a built-in DVD player, which I use to watch movies while walking on a treadmill. I have wireless Sennheiser head phones I set up when I purchased the TV, but they are aging out, which is why I decided to see if I could switch over to the Nokia head phones by adding BT functionality to the TV. Given its age, the TV's only audio out is RCA jacks. The Trond package includes a cable with RCA plugs and an adapter for use with the Trond device, so hook up to the TV was a breeze. The Nokia head phones use BT 2.1 with A2DP audio, so naturally I had some concern as to how well they would play with an AptX device based on BT 5.0. That has turned out to be a non-issue. I held my breath in ordering the Trond BT-DUO, since the first device I tried, a cheaper model from another manufacturer would not pair with the Nokia headphones and had to be returned. I guess you get what you pay for. The Trond is quite small, thinner but not much larger than a 9 volt battery and comes with very clear directions for use. From what I've seen so far, for my purposes it is a 5-star product. Update: The manual says in transmit mode the Trond can transmit to two separate devices. I am happy to report this works. After I paired it to a second set of BT headphones (with the first set off), I turned off the Trond, and powered up both sets of phones. When I powered the Trond back on, after a brief delay both sets of phones were receiving the transmission. This is the procedure specified in the user directions, incidentally.

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.

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.

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 like how small and light this is. I am using it to send audio from a VR headset to my larger stereo system. I specifically got two of these so that I could ensure I had low latency audio rather than risk just using one of these with another device. While the audio I get is low latency its definitely not "ultra low latency" to where you can not tell there is a delay. I hear a difference in the audio from the build in headphone speakers and my audio system. But the delay is acceptable and perhaps the best you can get for bluetooth. The major issue I have really is the volume. Mid volume from any audio source is enough to throw a block party on my stereo from any source, but not this! I have to turn it up to about 90% just to get acceptable audio levels. Now this has already happened once: I left the volume up loud and changed the source to something different and nearly blew up my speakers. Since I have two of these thinking maybe just one of them is defective with its output levels I already switched them around with the same thing. The other annoyance is that you would think they would remain paired with another, but every time I turn them on I have to re-pair them. I am really surprised I figured two units would work really well with one another. So I am going to use a in-line amplifier to fix my low signal issue, and I disconnect the built in VR sound to get around the echo I hear from the latency. The best thing I can say is this unit seems to be identical to about 4 or 5 other units on Amazon just branded differently, and this seller has the best price with all the included accessories for connection so it was the best value of the bunch.

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 ?

Can't describe how happy I am with this product. I ordered this with crossed fingers hoping it could transmit sound from a early-2000s-era receiver connected to a 1990s-era 100-disc Yamaha CD changer to 2 Bluetooth speakers. I had one small Ecoxgear speaker placed in my front yard, about 15 feet from receiver, through one living room wall. I had a larger Ecoxgear speaker on my rear deck about 25 feet from the receiver, through a wall between a living room and stairwell, and through a wall between the kitchen and deck. Was concerned here about the range and transmission of sound. Granted, because of the walls, I couldn't take it much further than I had hoped (Bluetooth generally will only go about 33 feet with range anyways), but it did work through two walls in an older home. Really feared it wouldn't, but it did. This speaker also was not on a direct straight line, but more of a direct to the transmitter's left line. It's also pretty simple to set up and extremely small. But the results for me were fantastic. It's only been a few days of use so far, but I would highly recommend the product to anyone. The transmitter/receiver also arrived on time, and I had reached out to a TROND representative after ordering to share my concerns. He was very helpful - even a little doubtful, honestly - about the transmitter/receiver doing what I wanted it to do. But there is a 30-day return policy and, again, it worked for me so I won't have to use it. The keys are to: 1) Charge the device and whatever Bluetooth devices you'd like it to connect to fully. 2) Follow the instructions included in the box the device comes in. 3) Know the range you will have using Bluetooth transmission (about 33 feet; less if there are barriers). It has not been used as a receiver, but that was not my primary purpose for ordering it. Still, it did the job and am very happy.

These things are neat. They are very compact and light, with a generous battery life and a pretty good range. They also come with a USB cable for charging and a double-ended audio cable for physically connecting them in transmit-mode. Initial pairing with devices involves a bit of jiggery-pokery (pro-tip: make sure all your receivers are active and sniffing for Bluetooth before you power up the transmitter), but once that's done, they work pretty darn well. I own two of them (one to transmit, one to receive) and have no regrets. However, I do have two complaints: 1) They add their own noises to the signal to tell you stuff like "I am active", "I am connected", "battery is low". These noises are, to put it mildly, obnoxiously loud. My mom complained about it when we were using them to stream audio to her headphones, and now that I have them hooked into my sound system, I see why - I just about had a heart attack the first time the receiver blared out the "I am connected" beep, and whenever it runs low on battery, it gently notifies me by emitting the loudest g**d**n sound that can physically exist in our universe, and it keeps doing that every five seconds until you either turn it off or your speakers blow out. Don't try plugging it in to silence it - it will keep on complaining the whole time it is recharging, despite the fact that it will happily run off a DC adapter at all other times. This is an audio relay, guys, not a smoke alarm or a nuclear reactor safety sensor - the deafening, repetitive tones are bit excessive. 2) I cannot get them to pair with my phone. I bought two, hoping one could connect to the phone in Rx mode. If that'd worked, I'd have used the double-ended cable to hook it to the other unit, that one set in Tx mode. Then I'd have been able to send my phone's audio signal wirelessly to two Bluetooth headphone sets, which is what I wanted. That way, me and my mom could listen to the phone without disturbing others. No joy - set the phone and device in seek-mode several times but could not get them to acknowledge each other. This probably won't affect you, unless you a) have an older phone like mine where the physical audio port is all jacked up from years of being janked when the wire caught on something, or b) got suckered into buying some sort of weird, hypothetical phone that, say, has no headphone jack because its makers hate their customers...hypothetically ;)

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