Just what I needed for the job I wanted it for, it connects both microphone and speaker simultaneously, exactly what you need to connect your headphones with their mic to your device.

It didn't last even a month. Very sensitive cable, small insulation. Also, its plug is relatively short, so it may not fit properly in some sockets.

Terrible product, I bought it to connect my headphones to my laptop. Specifically, I was looking for an aux cable with 3 pins so that the audio and microphone signals would pass correctly. In short, the sound is distorted and they don't work. Surprisingly, another powertech aux cable that I had worked perfectly, so I assume that maybe it's the model or I got a faulty piece. Either way, avoid it because even 1€ is a waste to throw away.