Razer Kraken 7.1 Surround Sound Over Ear USB Gaming Headset (Certified Refurbished) This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty Advanced 7.1 virtual surround sound engine The Razer Kraken 7.1 comes equipped with an advanced 7.1 virtual surround sound engine that immerses you deeper into the game. The left ear cup houses an enhanced digital microphone boom that pulls out only when you need it, maintaining the headset's sleek form factor while protecting the microphone during transportation and storage. The Razer Kraken 7.1 surround sound gaming headset has been field-tested by countless professional gamers to determine the optimal ergonomics for extended gaming sessions.