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

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.

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.

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.

...sort of!!! Maybe an audio efficiency artefact, but you can perceive the silence as it seems the sound is complete cut out, kinda like when you have low quality MP3s, at the low spots, then re-appears when the movie sound increases. Initially, I was a big fan of it, but having tried it with my bluetooth headphones and speakers, I'm certain of this behaviour... and I don't like it! When the audio level is sufficient though, it sounds great, hence the 3 stars. :-/

Cannot fault this amazing little gadget!! Took me a little while to get it up and running, but it was truly worth every penny. I have tried this as both a Reciever and a Transmitter, and the results are awesome. I contacted Customer Care as was initially having difficulties working out how to pair on my headphones and mini Tank speaker, and they explained in detail in an Email exactly what to do. Very clear and concise instructions that were obvisouly written by someone who knew what they were talking about. So many times I have been fobbed off with customer services, but not with Trond. If you decide to buy the product, you can buy with confidence. This is true value for money, and Customer Care will take care of you if you run into any difficulties - they were very quick to reply to me and were more than helpful - makes a pleasant change in this day and age.

This product is great in that it is simple and does what it should, however there are cheaper options out there that may work just as well. Two issues: 1) It does not support different codec options via bluetooth settings on Android (Galaxy 10 pro) - so you are stuck with the default option. 2) When the car starts the device stays "off" - you have to power on the device each time. This is an inconenience - but being a "convenience" device it is disappointing. If this cost $20-25 I would give it 4 stars, but at nearly $40 I would expect a bit more.

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 trasmettitore CONFEZIONE e DESIGN L'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 garanzia L'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/trasmettitore Sul 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 Ricevitore L'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 Trasmettitore In 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 SUONO Devo 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). CONCLUSIONI Al 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 - Batteria CONTRO - 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