Sennheiser Consumer Audio BTD 600 Bluetooth® Dongle - USB-A/USB-C Adapter with AptX Audio Codecs for Stable, Sound - Listen to Music, Make Calls, and Watch Videos

my work lap top has a crappy blue tooth receiver in it, would not stay connected to my Bose head phones and when connected was crackly. Used the cord for a while but hate cords. Found this and it works like a charm. connects to my headphones crystal clear audio and no issue. stays plugged into my work laptop 100% of the time. With fact my headphones can connect to 2 devices at once. I can hear my alerts from computer as well as listen to music from phone.

Update: Since I posted this review, the BTD-600 had a firmware update that has completely overhauled the device and improved the audio quality in major ways.For starters, the most recent firmware update claims to add support for the sample rate, 96khz. I say claims to because that's not what my Qudelix-5K Bluetooth DAC is reporting, and even before this update, Windows let you select 96khz. I suspect even if it did support 96khz, the Qudelix would not be able to receive it at that rate. It uses the QCC5124 chip, and if you look up the features, the chip doesn't seem to support 96khz. The first mention of 96khz audio came with Bluetooth 5.2. With the BTD-600 being a Bluetooth 5.2 adapter, it would make sense for it to support 96khz, but I don't have a device capable of testing it. For the record, it seems that chips that support AptX Lossless use Bluetooth 5.3, so I doubt this adapter will ever receive an update adding AptX Lossless.While I can't say whether it's actually transmitting 96khz, I can say that the 280kbps limit has been lifted. On my Qudelix-5K, I'm able to receive audio generally from 350kbps up to a maximum 430kbps, and the difference in audio quality is significant. Before, the audio quality was noticeably compressed. Not terrible, and the benefits to latency make up for those shortcomings, but also not great. Now, to my ears, it's functionally perfect, and the best part about it is that it does this without affecting latency. It still seems to deliver 80ms of latency, just with significantly better audio quality. This is very different from adapters that have separate low latency and quality modes, like the Creative BT-W5, which seems to at least double the amount of latency when in quality mode, and limits the audio quality in low latency mode, similarly to how this adapter used to work, and that adapter is 25% more expensive than this one, and in terms of its implementation of AptX Adaptive, it's just worse.For this reason, this is an exceptional adapter for movies and games, which, in my opinion, is the big draw of AptX Adaptive. If you just want high quality for music, AptX and AptX HD are open source now. On Windows, you can buy Alternative A2DP for $5 and get high audio quality, without needing separate hardware, and I'd expect more devices to start supporting AptX and AptX HD by default from now on, but high audio quality and low latency is something you can only get from AptX Adaptive, and even other, more expensive products aren't able to deliver what this adapter does.That being said, it's not completely perfect. I noticed some stutter. It's pretty bad when you first connect your device. Over time it becomes more stable, but brief instance of stutter still happens occasionally. Signal strength is far more important now than before, probably because it's not hard to keep a 280kbps audio stream stable, so you're going to want to keep a clear path between your headphones and the adapter, and try to keep distance as low as possible. Maybe this is improved with a Bluetooth 5.2 receiver/headphones, but I can't speak for that.

Works great to bypass apple products limited Bluetooth transmission for much clearer sound quality. Will not work with iPhone unless phone is also being charge due to power withdrawal limits of those devices. Works with iPad and laptops well and easy to connect.

Needed a method to offload Bluetooth audio from my Bluetooth radio so hands free audio didn't introduce any additional latency. Worked perfectly

El transmisor ofrece una gran estabilidad en la conexión. Se complementa a la perfección con los audifonos M4W de Sennheiser y permite utilizarlos con el codec de maxima calidad de audio inalámbrica que estos permiten: APTX adaptative. Es recomendable actualizar su firmware antes de usarlos por primera vez usando "Sennheiser BTD 600 USB Dongle Firmware Updater". Un producto absolutamente recomendable.

Every Bluetooth behavior is wrong. Doesn’t hold a connection when you’re using it. Recaptures devices when you’re not, even when the host device is powered down. Fails to connect to headphones. Requires several power-cycles per day to work at all. Utter garbage. An embarrassment of incompetence.

This dongle is absolutely fantastic......when it works. If you have a Sennheiser headset, this will work with them. At first, the connectivity is really good but then there will be times where it will disconnect. To fix that, you would have to either turn off, then turn on the headset, OR unplug the dongle and plug it back in. I used this to have my headset wireless while being able to use my GoXLR while gaming, or streaming. It became an annoyance when it would disconnect during my gaming sessions or just simply listening to music. Even though I do think the price is a little on the high end for this issue, it does work really well, when it actually works if that makes sense. Even when there are other reviews saying the same thing I always get a product to try it for myself and I had it for a month and a half to give it a shot for the Christmas time since there is a longer return policy. Numerous times it has disconnected and I had to return it. The lag is very minimal, and the sound quality is still good. The dongle is a small size so you would be just fine that it won't take up much room in the back of your PC or wherever you plan on using it. Use at your own risk, however in my opinion with the connectivity issues that myself and others are saying, I don't think it's worth it. I ended up going wired connection instead.

I paired this with a pair of skullcandyANC2 headphones. Can't say enough. Sound is crystal clear weather i am listening to music or online or video.