None
I bought this headset because I have a friend who had it and I didn't feel like I had the same quality of microphone, I could hear my breathing despite the noise cancellers, the sound is not bad but the headset is already starting to have false contacts. I would not recommend this product at all, you can find much better for less. I had to buy a separate microphone to be able to hear me properly. I'm not sure if it's a good brand for the components, but not for the keyboard, mouse and keypad.
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