Very good product. It connects immediately with Windows 10. From the Bluetooth settings of Windows it can be turned on or off. It has a green LED light that shows whether it is active or not.
I use it with wireless speakers SONY SRS-XB21, to listen to music away from the PC. It delivers music in stereo very well.
Range: Placed at the height of a desk (75 cm) it reaches 10 meters. At distances over 8 meters, if there are walls in between, it may have some interruptions behind certain points of the walls. However, with some movement, positions where it catches signal will be found.
To increase the range, I placed it with USB cables at a height of 130 cm and it caught even better. That is, it only had interruptions at a distance of about 8 - 10 meters when the range was "shaded" by interference from two walls, outside on the balcony! Even in this case, with some movement, positions where it catches signal will be found.
From these, I conclude that its range is very good.

Unacceptable product, it is not recognized by Windows 10 Home 64 and there are no drivers available for Windows 10. Luckily, it worked with Windows 7 drivers. Additionally, it also causes sound interruptions, meaning it is the most useless thing

I bought it to connect the Xbox One Controller to my PC and it keeps freezing at regular intervals. I haven't tried it with other connections, but it doesn't work for the job I needed it for.

Easy to use, fast, reliable.
I connect wireless Bluetooth headphones and controller seamlessly, fast connection and automatic driver installation on Windows 10.

Excellent
I have connected it to Windows 10 and have paired it with around 4 devices.
Speakers
Headphones
Gaming headphones
Dualshock 4
It doesn't need any drivers, it finds everything on its own and overall I think it's worth its money

In Win10, it is PnP (rev.18187-03) and you don't need to install drivers. I have successfully connected handsfree, headset, and DS4 without any issues or glitches.