http://www.pcgamer.com/steelseries-siberia-v3-review-2/
"The Siberia V3 does have a clear weakness in its microphone. SteelSeries goes with a retractable mic design that sits slightly in the leftfield compared to its competitors. The advantage is in the neatness of its design—just push it back into its hole when you’re not using it, or tap the side of your left earcup to mute it.
The inevitable disadvantage is that by default it’s extremely quiet, so you’ll need to use that SteelSeries Engine software or your OS settings to boost the mic gain if you want people to hear how totally serious you are when you tell freshspawns to hold it right there and take off their shirts in DayZ. However, boosting the signal means you’re also amplifying all the background sounds around you, and the dirty part of the audio signal coming from the electret mic, which the hard-wired noise gate can’t always filter out. In short: you’ll be heard just fine after some tinkering, you just won’t be broadcasting in crystalline tones."