SteelSeries 9H USB Headset. Equipped with an advanced USB soundcard, the SteelSeries 9H provides users with Dolby technology, SteelSeries Engine support and much more. The 9H features a retractable microphone system. Pull it out when you need it. Hide it in the left earcup when you don't. The SteelSeries 9H features double enclosure technology. A second internal enclosure is sealed around the back of the speaker creating a closed design typically only found in high-end audio studio and DJ headphones. When coupled with the extra-padded, leather ear cushions it creates a level of noise isolation unlike any other headset in gaming.