SteelSeries Siberia In-Ear Headset combines in-ear earphones and a unidirectional microphone. The headset is specifically designed for a multitude of uses including MP3-players, laptops, Sony PSP and otherportable consoles as well as IP-telephony with the separate unidirectional microphone. To ensure maximum comfort the earphones can be adjusted by using one of the two earpieces supplied with it to fit your ear comfortably and shield off surrounding noise allowing for disturbance free IP-telephony. The volume can easily be adjusted with the separate volume regulator.