Flawless, honest, and reliable. I don't know why I read negative comments, for me it worked perfectly for the money.
P.S. We don't expect something that costs 10-15€ to perform and be like something that costs 200€. Get a grip, some of you here.

I connected it for the first time, it worked fine (with the usual delay always)..
The next time I tried to pair it, it was almost impossible and very inconvenient.
As they say, you get what you pay for.
In the end, I bought Sennheiser

Easy connection, but after a while the sound has fractions of a second delay and the delay increases over time. This is a minus for movies, but it's perfect for music.

Lightweight and easy to use. There are many uses for such a device, and this particular one has been very satisfactory so far.

Personally, I use it in a car that only accepts CDs and has a 3.5mm jack. I have attached it with double-sided tape in a spot where it is not visible, and it charges with a car charger. However, anyone can attach it with Velcro inside the glove compartment and remove it for charging when needed.

Minimal, discreet, lightweight, and does its job perfectly as promised. The packaging includes all the necessary cables. I have connected devices with Bluetooth versions 4.2 and 5.0, and it worked flawlessly and quickly. Although I had doubts about its 12 euro price, take it without hesitation. It connects everything together between two devices, not, for example, a TV and two headphones. It works with speakers, monitors, headphones, and can receive or send audio. To make it work, you need to simultaneously open the two devices you want to connect, and they will automatically connect to each other.