TROND Bluetooth Transmitter Receiver 5.0, 2-in-1 Wireless 3.5mm Audio Adapter, AptX Low Latency, Smart Codec Indicator, 2 Devices Simultaneously, for TV, Home Sound System

Very Fast Despatch. Nice little unit, a bit plasticky but functions well. Paired really easily with a variety of sources. Perfectly useable line-of sight range of about 10m, deteriorates as objects are in the way - as expected. Slight hiss when no signal present, barely any decoding delay so good for watching video (lip-sync) but not fast enough for IEMs. Comes with several useful connectors. Nice balanced sound for such a low-cost unit, recommended.

I have several pairs of high quality Bluetooth headphones which work great with my smartphone, but wouldn't play nicely with my Windows 10 PC. I previously tried a cheap USB Bluetooth adapter, but the sound quality was rubbish - lots of lag and crackling.This Trond Bluetooth DUO device works almost perfectly with my PC. It supports AptX Low Latency for the best sound quality. It's definitely much better than the cheap USB Bluetooth adapter I was using before.Pairing with my Bluetooth headset was easy. The hardest part is remembering what button presses are required! 3 seconds on the multi-function button (MFB) turns the device on or off. To enter pairing mode, it's a quick double tap on the MFB.There's a red and blue LED - different combinations of flashing lights mean different things... you have to refer to the user manual to understand the flashes, which is a little annoying. Would it have cost much more to have several different LEDs with little icons to indicate their purpose? Even basic home Internet routers have several LEDs with icons.This Trond device stopped working once during the first month of use. I had to switch it to receive mode and then back to transmit, then re-pair with my headphones, then it started working again.One unfortunate problem is the noise generated when you have the power plugged in - you can hear low-level static interference while music plays. Not good. I would have happily paid more for a device that didn't suffer with such basic electrical interference.For the price this device is fantastic. I just wish it was a little easier to use, with separate buttons for different functions and more LEDs so I didn't have to remember what all the morse code flashes mean! And the static noise while charging is a real shame.

The Trond BT-Duo S arrived promptly and well packaged. It's very compact, smart, and came with clear, well written and detailed instructions.I use it mainly to stream music (classical, pop, rock) from my HiFi (Cyrus Lyric) to a set of AKG N60 wireless headphones which I bought at the same time as the Trond device.Ease of operation, range and performance are all very good. There 's no noticeable drop in sound quality between using the Trond with my HiFi and using the wireless headphones directly with my iPAD. I also for interest's sake used the Trond to connect my Panasonic TV with the wireless headphones and didn't notice any significant lag between image and sound. I've only used the Trond in transmission mode, not as a receiver.The only (minor) issue is that the Trond website referenced in the instructions doesn't seem to exist, though they also provide an email address.

It works pretty good so far.. volume buttons not working (don't know if is just for the headphones in general, as I've tried two so far, or mine is having problems..)Sound quality not impressive.

I chose this product over others because it not only supported aptX low latency mode, but also indicated the currently active audio codec through the blue LED indicator.Initially I had problems pairing this with my TROND BT-RX S (https://www.amazon.co.uk/dp/B01M9I0LSK/), and so contacted eTROND customer services. They were great, replying back to me very quickly, and pointed out that the flashing blue LED meant that the TROND BT-DUO S had instead paired with another active Bluetooth device, in my case our Samsung TV elsewhere in the house!Having ensured all other Bluetooth devices were turned off, the BT-DUO S and BT-RX S paired immediately. The flashing blue LED confirmed the aptX low latency codec was active, and indeed there were no signs of the lip-sync problems I have had with other wireless transceivers used to connect headphones to the TV. The quality of the sound is also very good. Highly recommend.

Only had for a day, and only used in receiver mode but so far very impressed...!I bought it to connect a pair of wired Bose QC25 up to my Panasonic TX-55FZ950 OLED which has a built in BT transmitter. Went for this one as its one of the few that states low latency in receiver mode as well as transmit.The device paired straight away with no problems.It also connects automatically to TV when I turn on the TrondI have set bluetooth audio level to 50% on TV which means I can just use the audio buttons on the Trond to control volume.Sound quality is decent enoughIt's smaller than I expected (which is good). see picture compare to £2 coin

Have two of these. One is sending from my receiver to the other one and here I use headphones with cable.Why you ask?Sony flagship Z9D lacks the basic ability to send audio over Bluetooth. Secondly, if it did I would doubt APTX ll would be provided which means that you will suffer heavily from lipsync.So one is acting as transmitter and the second as receiver. This works fine except one thing.What thing!?With this setup, depending on your type of earphone/headphones you might experience background noise.You will probably not have background noise if you only use one as transmitter and using a Bluetooth earphone directly connected to it (hopefully you have aptx ll).Why? Don't really know but you can get rid of this background noise if you find the right headphones. In fact my older Steel Series (gaming headset for PC) works perfectly without any noise issues. Monster pro turbine, vsonic, Samsung earphones etc all gave background noise.Problem solved with the Steel Series. Awesome!Now the sound quality is very good. People who says otherwise must have crappy earphones or a faulty unit.Please be careful when turning off the receiver as the unit makes a pip-sound (very very loud). Not sure if it will make this sound if battery runs out.It does have interference if I cover the unit in my hand but nothing while in my pocket!?Initially I bought their silver-unit which act only as a reciever but it got much much more background noise. Never tried my Steel Series with it so can't say for sure if it would have been gone or not.Summary. If your BT headphones have aptx ll you are probably safe to background noise and lipsync issues. I didn't hear anything with my non-aptx bose 35. If you use wired headphones and use this unit as receiver and tv (or whatever) as transmitter you are probably safe for background noise. The noise will be there if you use two of them. Then try all headphones you have to make it less.5 stars if the volume buttons is one step adjustment instead of holding the button down AND if the pip during power it off is reduced /removed.

The product does what it promises however within seconds of the music or movie dialogue stops it starts bleeping. It's very ANNOYING!. Also the connection is a bit unstable giving jittery sound which will only stop after repairing which you need to do EVERY SINGLE TIME. I'm very disappointed as the unit looks good and it sounds good so much so that I would have used it with my non bluetooth headphones, however, most of the time it would have been in my bedroom but with that ANNOYING beeping it won't let me get any sleep so I'm returning it fast.

The Trond BlueTooth transmitter with codec AptX Low Latency works perfectly. It is small,Trond Bluetooth v4.1 Transmitter Empfänger/Wireless 3,5 mm Audio-Adapter, mit aptX geringer Latenz sowohl für TX & RX, Dual Stream und Volumen Controller easy to use, battery capacity is good and pairing easy. The synchronisation between screen (lips) and sound is perfect when using it to watch/listen to TV. Of course my Denon AH-GC20 headphone also has the AptX Low Latency codec,I bought the Trond BT v4.1 transmitter because my previous BT transmitter was just not suitable for watching TV. The sound was totally out of synchronisation with the screen.

Oramai siamo circondati di oggetti che utilizzano il bluetooth per fruire dei contenuti audio e video e sempre più spesso si rende necessario permettere a dispositivi non più nuovissimi, di comunicare con i dispositivi wireless.Proprio per questo motivo (rendere Bluetooth il mio vecchio TV e trasmettere l'audio dal mio smartphone al mio Hi-Fi) ho deciso di recensire l'adattatore Bluetooth TROND BT-DUO S, evoluzione del modello precedente, che funge sia da ricevitore che da trasmettitoreCONFEZIONE e DESIGNL'adattatore TROND BT-DUO S si presenta con un packaging semplice, molto ben protetto e completo, contenente:- l'adattatore TROND BT-DUO S- Un cavo con ad entrambe le estremità un jack da 3,5mm maschio- Un cavo USB-MicroUSB per la ricarica- Un adattatore RCA-Jack da 2,5mm femmina- Le istruzioni in inglese e la garanziaL'adattatore è in una plastica leggermente gommata che ottimizza il grip e con una banda in alluminio con il logo Trond che la rende molto piacevole da vedere.Sul lato destro troviamo il tasto di accensione/spegnimento, e i tasti per il volume/avanzamento tracce (in base alla lunghezza della pressione sul tasto). La possibilità di regolare il volume e spostarsi tra le tracce è una cosa che ho apprezzato moltissimo.Sul lato sinistro troviamo solo lo switch per usare l'adattatore in modalità ricevitore/trasmettitoreSul lato basso invece troviamo l'ingresso Jack da 3,5mm e l'ingresso MicroUSB per la ricarica.L'adattatore ha una batteria integrata che permette una decina di ore di autonomia.UTILIZZO - Modalità RicevitoreL'utilizzo come ricevitore (ad esempio: trasmettere l'audio dallo smartphone all'impianto hi-fi di casa che non ha il bluetooth) è davvero semplicissimo!Occorrerà collegare l'adattatore al dispositivo che riceverà il segnale (ad esempio all'amplificatore dell'hi-fi) tramite il cavo jack o RCA, accendere l'adattatore, questo entrerà in modalità di pairing e poi accoppiare il dispositivo tramite il device che vogliamo usare per trasmettere (ad esempio lo smartphone).A quel punto potremo godere dell'audio in qualità CD, grazie al supporto del codec APTX-Low Latency (a patto che anche lo smartphone supporti tale codec).UTILIZZO - Modalità TrasmettitoreIn maniera simile a quanto fatto nella modalità ricevitore, occorrerà effettuare l'accoppiamento. Per procedere collegare l'adattatore al dispositivo da rendere wireless (ad esempio il mio vecchio TV), spostare il selettore su TX, poi prendere il device da accoppiare (nel mio caso le cuffie Bluetooth), accenderlo e metterlo in modalità pairing.A questo punto accendere l'adattatore TROND e tenere premuto il pulsante di accensione per 3 secondi. Quando i due dispositivi saranno accoppiati la luce led blu dell'adattatore smetterà di lampeggiare.Anche in questa occasione non ho avuto nessun problema con i miei dispositivi e tutto si è configurato in pochi secondi.IMPORTANTE: Il dispositivo funziona anche mentre in ricarica, ma occorre collegare il dispositivo alla fonte di carica prima di accenderlo.QUALITA' DEL SUONODevo dire che la qualità è davvero ottima, ho testato l'adattatore in modalità ricevitore con il mio mini hi-fi Kenwood e con il mio impianto con amplificatore a valvole, tramite il mio Xperia Z3 (che supporta l'APT-X) e la differenza rispetto al CD è semplicemente sul volume (dipende dal telefono) ma il suono ha una ottima dinamica e spazialità, cosa che non avevo mai trovato con altri adattatori Bluetooth. Ovviamente non è un dispositivo per audiofili, ma soddisferà il 90% di chi cerca musica di qualità tramite Bluetooth. Rispetto al mio Tp-Link Bluetooth 4.0 senza APT-X, l'audio è davvero di qualità superiore.Ottima la resa anche in modalità trasmettitore con il mio TV Samsung.Inoltre il Codec Apt-x presente è l'evoluzione più recente ossia quella a Bassa Latenza, che permette di risolvere uno dei classici problemi del bluetooth: quello del ritardo audio.Con questo adattatore infatti non si avranno problemi di fuori sincrono tra video e audio.Ovviamente essendo la latenza molto bassa (40ms) ma non nulla, questo device non può essere utilizzato per scopi professionali (ad esempio da musicisti).CONCLUSIONIAl prezzo al quale è proposto, il TROND BT-DUO S è davvero un ottimo acquisto. Ha lo stesso prezzo di quelli della concorrenza ma offre di più, ovvero la cosa più importante: il miglior codec Bluetooth.PRO- APT-X Low Latency- Tasti volume e gestione tracce- Facilità di utilizzo- BatteriaCONTRO- nessuno

There appears to be a lot of confusion about the various Bluetooth transmitter/receiver products and what they can and cannot do, and what is required to get the benefits of advances in Bluetooth technology. To clarify, there are currently three ‘flavors’ of music quality audio Bluetooth- A2DP, AptX and AptX LL. A2DP is standard Bluetooth that most cell phones, computers, wireless headphones and speakers use. It is serviceable with decent audio quality but up to ½ second of delay. When just listening to music, the delay doesn’t matter, but for watching TV it can be annoying, leading to a batter hitting a ball and the sound coming a beat later, or messing the sync of lips with the words they’re saying. AptX has been around for a while as a higher quality version of Bluetooth audio, with better sound quality and less delay, but relatively few devices support it and it still has a delay of roughly 1-2 tenths of a second. Better than A2DP, and good enough for people who aren’t as sensitive to the delay. But obvious and annoying when the TV sound is on (for people in the room), while someone is listening through wireless headphones.So the AptX people developed AptX LL, standing for ‘Low Latency’, a fancy term for low delay. AptX LL delay can be as low as 40 milliseconds (less than half of a tenth of a second), and for TV watching, is almost undetectable. In order to benefit from AptX LL however, you need a source that is transmitting it and a headphone or speaker that is receiving and reproducing it. This is where I think a lot of negative reviews are coming from- if you don’t have AptX LL at both ends, you won’t get any benefit. Since there are only a handful of AptX LL headphones, and no TV or hifi manufacturers have adopted it yet, miniature devices like the DUO S are designed to let the vast majority of existing audio devices take advantage of this technology.The Trond Duo S provides the most advanced Bluetooth audio experience currently available, and I am very happy with its performance. I bought it specifically to obtain satisfactory wireless headphone listening to my Sony XBR TV. When connected to a continuous source of power via the microsd port, it pairs almost instantly when I turn my headphones on (note many TV’s kill the power to their USB ports when they are turned off, and the Trond will shut off after some time to save the battery, and then need to be turned back on and re-paired when the TV is turned back on, so I would recommend using an old phone charger to power it). I’m using the Avantree Audition Pro, one of the only headphones on the market with AptX LL built in, and the sound is excellent, with negligible delay. The DUO S can also act as a receiver, to turn any pair of headphones with an ⅛” jack into AptX LL wireless headphones, but of course you need two of the DUO’s, one transmitting from the TV or other device and one connected to the headphones.Finally, I must comment on Trond customer service. This has been by far the most responsive company I’ve done business with in the internet age. We’re talking a $40 device from China. I was not expecting much when I emailed them a question. And yet I have experienced a level of communication that would make Apple envious. My emails were responded to promptly, in detail, by individuals with excellent spelling and grammar who clearly want my experience to be as positive as possible. I originally had some issues with getting the LL version of AptX working with my Avantree Audition Pro’s, and instead of blaming the other company, Trond bent over backwards to get to the bottom of the issue and offer solutions. So 5 stars for Trond customer service as well as the DUO S.

5 etoiles sans hesiter!Je ne sais pas comment sont les autres combinés emmetteur/recepteurs bluetooth, mais le Trond que j'ai acheté correspond exactement a mon besoin. Petit, leger, robuste, simple a utiliser, bonne autonomié, bonne puissance "output" en recepteur,et SAV au top! Le representant d'assistance ma ecrit avant meme que j'ai réceptionné l'appareil pour me proposer des conseils pour faciliter ma prise en main...(je n'en ai pas eu besoin, car l'interface utilisateur est parfaitement claire et l'appareil est "plug and play" . Je suis musicien et je l'utilise pour faire passer des musiques enregistrés de mon ipod a la sono pendant les pauses de nos spectacles, et pendant les repetitions aussi en utilisant mon ipod SANS FIL pour controler choix de musique et volume. C'est geniale. On peu se deplacer et garder le controle a tout moment. Rapport qualité prix imbattable. Avis spontané, non-solicité. Pierre

Bon article qui semble de très bonne qualité et qui arrive avec tous les cables nécessaires (mais pas de chargeur comme tous les petits appareils Bluetooth qui peuvent être rechargés sur une prise USB ou avec un chargeur de téléphone).J'ai pu l'appairer sans problème avec mon iPhone en mode récepteur (Rx) mais pas en mode transmission (Tx). Ceci est du au fait qu'Apple utilise un protocol particulier et breveté du Bluetooth 4.x (Low energy ou smart) qui n'est pas compatible dans ce sens avec le protocole standard. Je voulais appairer des prothèse auditives MFI (Made For iPhone) mais ça ne marche pas. Avis à ceux qui auraient la même idée...==========================================Good device that looks sturdy and of good quality and that comes with all necessary cables (but without a charger as most BT devices nowadays as it can be easily charged with a phone charger or via your computer USB)I managed to pair the device with my iPhone in Receiver mode (Rx) without any problem but not in Transmitter mode (Tx). This is due to the fact that Apple uses a modified, proprietary BT 4.X protocol (Bluetooth Low Energy or BT smart) that is not compatible in this upwards direction (no problem in downwards direction when the Apple device is the transmitter and other BT device the receiver). I wanted to use this device to transmit sound from my Mac (not BT 4.x) or stereo directly into my BT hearing aids but it didn't work as these are MFI (made For Apple) and can only connect using the Apple BT protocol. Be aware if you have MFI HA's and would like to end sound directly to those.