It simply doesn't work properly. Devices can be connected, but the signal is not stable and they easily disconnect. I needed it for a remote control and it has become useless, so I bought another one that works.

I read it directly on Windows 10 but.... When I shut down the computer and open it again, they don't automatically connect in this specific case the mouse!!! Otherwise, when it is connected, it works well!!!!

The Bluetooth is not really 5.0. The controller is the CSR8510 A10 (Bluetooth 4.0)... Useless!

I have it since September. It frequently disconnects on its own, restarting the device (Xiaomi Mi True Wireless Earbuds Basic 2 Bluetooth Handsfree and wireless speaker). For some reason, as soon as I press to check the internet connection, the sound cuts off and takes about 1 minute to come back. This incident happens every time I press the network, regardless of how long it has been since the previous time. When connected to a wireless mouse (Xiaomi Mi Dual Mode Wireless Bluetooth Mini Mouse), I didn't notice any difference compared to its USB connection and it worked normally alongside the headphones. For its price, it's okay, but only up to that point.

I don't know what others say, but the device works perfectly, without any issues, without drivers, it's simply plug and play. I have it in a USB 3.0 port of my computer with Windows 11 Pro x64 (ASUS Rog Strix F-Gaming B360 motherboard). I have tried many devices like Huawei FreeBuds 4i, Soundcore Motion+, JBL wireless, and others, and they all work perfectly. It is Bluetooth 5.0 and there is no audio delay, it has the same range as my Logitech G533 Wireless. Truly the best 3€ I have spent. My product is the one in the 6th photo, without the hole for the lanyard.

EDIT: I decided to test it for 2 days working on the computer with the Huawei FreeBuds 4i to see if I would have any issues/disconnections, and there wasn't a single disconnection except when the battery of the headphones ran out after 4-5 hours.

Recognized in OLD Linux kernel without needing a driver. The problem is that after 2-3 hours it stops working and needs to be removed and reconnected. I don't know if I got a faulty one, but since I need it for 24-hour operation, it didn't serve me well.
Update:
It is the "ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)" for which there is an open bug in the Linux Kernel since 2013 and it has become the bridge of Arta, they fix it and then it breaks again.
https://bugzilla.kernel.org/show_bug.cgi?id=60824
If you want it for Linux, check out the Orico BTA-608

I used it to connect an 8bitdo controller... After searching with the program recommended by a YouTube video while it was recognized as a device, it could never connect to it. The problem lies with the plug n play drivers of Windows 10 2004 and above! Eventually, I switched to Windows 10 1909 and everything was fixed! The blame goes to both the operating system and the adapter for the drivers... As for the adapter on Windows 1909, I have to say that I had no disconnections but a slight delay.

After a lot of searching for installation on Linux for those who have the "ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)"...
I had to execute the following command:
# echo "options btusb reset=1 enable_autosuspend=0" | sudo tee /etc/modprobe.d/csr-bluetoothdongle.conf
and then restart, and it worked with Ubuntu 20.10.

However, it still has issues and the sound is lost, and I have to reconnect

Update:
They often lose connection. Not worth it.

Connected directly to WIN10 with drivers from Windows. The Xbox controller and keyboard (bt v5 for both) connected instantly, so I didn't mess with it anymore.

In my case, it was Plug n Play on a Gigabyte Z170X Gaming 5 motherboard with Windows 11 Pro software. It works perfectly with my Xbox One Controller and has not presented any interruption or instability in the signal.

Personally, when I plugged it into the computer, I didn't need to install any drivers, it worked as Plug n Play. I don't know if everyone will have the same experience. The product does what it says and is very convenient in size.

Unacceptable. It arrived without a disc. The various drivers suggested in the comments do not work on Windows 7. When I try to connect the Apple Earpods first generation, Windows crashes with a blue screen and immediately restarts. Note that I am a computer engineer, not someone clueless. Someone should upload the drivers from the disc to a Dropbox or somewhere they can be found, because the ones circulating on foreign sites do not work for Win7

I connected it and it worked perfectly fine, without using the CD or downloading drivers or anything. I simply plugged it into the USB port and it did its job.

It was purchased due to BT 5.0 support, but from the comments I found the drivers easily, however it constantly disconnected both headphones and keyboard/mouse, even with only one device connected at a time. It was returned through Skroutz.

I bought this BT-006 Bluetooth 5.0 EDR, with the exact same packaging (the store sold it to me without a CD). No matter what I have tried, I cannot install the drivers I downloaded (realtek_bluetooth_5.0_driver_(RTL8761B)). Unfortunately, the computer recognizes it as a Generic device. Major disappointment.

It worked for me IMMEDIATELY on Windows 10. Completely plug n play. I also tried it with a Bluetooth mouse and it works perfectly.

It didn't work immediately on WIN10, but I knew that could happen. I saw from a friend who mentioned the following and in 2 minutes, everything was fine. It's a relaxed 5-star product for its price, and the installation difficulty is laughable.
https://www.realtek.com/en/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-usb-3-0-software and I downloaded the Win10 Auto Installation Program.

It's not the cheap price that it costs to buy it. It's the hassle you will go through to make it work and in the end, depending on the case, like mine, it will end up in the trash. Constant disconnections after wasting time to find a solution. I found the drivers as other buyers suggested, I did everything one can do. Note that I have great familiarity and experience with computers. And something else important. It says it's Bluetooth 5.0, but if you look at the type when you install it and investigate a little, you will see that it is 4.0 (csr8510a10). Therefore, stay away from this garbage.

Well, it has version 5.0 and it's simply perfect. It remains connected at a long distance and doesn't lag anywhere!

I bought it to use it with the new PS5 controller and DS4Windows on Windows 10 Pro. Although I haven't done many tests, so far it works great on the things I tried. Before connecting it, make sure to install the drivers first.
As a downside, I would say luckily I still have a DVD-ROM on my PC for the disc. If you don't have one, even though it has some instructions in the packaging, there is no website to download and install the drivers from.
EDIT: A friend here provides a link for the drivers if you don't have a DVD-ROM.

I got tired trying to find a way to make it work since I don't have a CD slot.
I managed to do it by going here: https://www.realtek.com/en/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-usb-3-0-software and downloading the Win10 Auto Installation Program.
My Edifier X5 headphones work perfectly fine.

It does its job as it should. Its packaging comes with a miniCD containing the necessary drivers, so there was no problem with installation and starting operation.
It does its simple job just fine, it was tested for a few hours but worked well with headphones. I haven't tried yet to see how it functions with multiple connected devices. If needed, I will come back, but for now, everything is good

Everything is fine with this specific Bluetooth device, except for the drivers:
1) Windows 10 does not recognize it.
2) No driver can be found through the update process.
3) Even though it uses realtek technology, the new drivers do not activate it.
The ONLY way to make it work is to find a CD-Driver and install the miniDisk (which comes with the product) and transfer the drivers to a flash drive.

After installing the drivers, restart and you're good to go.

For those looking for a Bluetooth Adapter 5.0 to properly function with Sumsung Galaxy Buds, you are in the right product!

In windows 10, a driver upgrade was needed through windows update for it to work. From then on, flawless operation. Excellent in functionality. Very good range, low latency, etc. Exceptional.

Update: On a second computer that was tested, again with windows 10, windows update did not find the necessary driver. Installing the driver from the CD solved the problem. But be careful if you don't have a way to read CDs. The driver (Realtek Bluetooth 8761B) is not available anywhere on the internet for now and without it, it doesn't work.

In Windows 10, it worked perfectly. It was recognized immediately and functions as if it were a pre-existing component of the computer.