PreSonus MicroStation BT 2.1 Monitor Controller with Bluetooth Connectivity

It works as advertised. No need for drivers. You just plug it in and connect your cables and it's good to go. I have two different inputs coming in to the Presonus, one from my computer and one from my Focusrite recording interface. This allows me to play sound from my computer though my monitor speakers without having to use my Focusrite interface. No more switching cabled back and forth. I was also able to add a subwoofer using the sub out on the Presonus. It works flawlessly and does not seem to introduce noise to the signal. Having a sub out is crucial for me because my JBL speakers don't have a sub output.You can connect a bluetooth device in to the presonus like a phone, but a downside is that it won't seem to pair with an external speaker without a cable. I was hoping to be able to play music and stream to some bluetooth speakers, but it doesn't seem possible.

Handy little device to make any speakers without BT have BT connectivity. The only problem I had with mine is one day I adjusted the volume, and I felt a shock, then something fried on the circuit board and the sound quality was bad. The PreSonus Customer Service was awesome, and sent me another unit for free, and didn't even require the bad unit to be shipped back.

It is great and we love it. Easy to set up and use, works great with virtually no latency.

UPDATE: Even using a specifically 5V power adapter still has the weird high pitched noise. I don't know how to remedy it.First off, the design is nice and compact. I love how they added their lit up logo on the top; I have multiple presonus products so you'll see that lit up logo all around my desk. everything you need to control your monitors and sub are on the top, and the ports on the back are sturdy and easy to understand. The sound quality is pretty much the same if not that, as plugging it through direct to the speakers. There is one specific thing you (in my opinion) NEED to do if you want to use it correctly though. I would advise AGAINST plugging it into your PC or a USB Hub. This is only a controller and there's no drivers necessary so you wouldn't need to do that anyway. What I HIGHLY recommend to do, however, is to make sure you plug your usb cable into a power brick, say for an iPhone or something similar, that is SPECIFICALLY 5 volts. You'll notice on the back where the USB C power port is that it even says DC=5V. If you plug into a powered USB hub, or into the back of your computer, Or pretty much (from my experience) into ANYTHING that is NOT specifically 5 Volts, you will get this faint but audible high pitched squealing when you have the volume knob at 3 and 9 o'clock. And I know it has to do with the power because you'll hear the same noise even if you have everything BUT the power usb cable plugged in. So, if you have any of those mini apple chargers left over, use that to plug in the USB since those are rated for 5V only. The sound should be pretty much entirely gone when you do this. That is the only little quirk about this device, othewise I think it's a great product and perfect if you have your interface somewhere a little farther out of reach. Being able to pair your phone to your monitors through this box is also an additonal bonus as well if you just want to listen to music off your phone on your system. I personally use this paired with presonus eris e5 monitors and their eris sub8 subwoofer. The sub bypass button is really handy as well if you don't want to have the low end extension for certain listening purposes.

Good sounds and the Bluetooth works just perfect, I attached my KRK monitors

Especially handy for adding subwoofer if your system does not have a sub out. Mute function. Best part is this has TRS in/out. If you don't know what that means, don't sweat it but understand that TRS = good or professional-level. TRS cables and adaptors are more expensive but much, much quieter and reject noise like RF interference.Box is metal, great quality. Quality D/A conversion. Bluetooth reception is great but, as with seemingly all BT receivers, volume is a bit low, so I added on a line-level volume booster https://www.amazon.com/gp/product/B0945RFJ6Z after this device and before my receiver. Highly recommended.