Razer Tiamat Over Ear 7.1 Surround Sound PC 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 Full Audio Customization - Easily and accurately fine-tune the level of each audio channel, position, and bass depth to your exact enjoyment using the supplied control unit. Maximum comfort, maximum durability - The Razer Tiamat 7.1's sturdy construction and padded leatherette ear cups ensure extended headset life and ultimate comfort so you can keep going during those hardcore marathon gaming sessions. Retractable, noise-filtering unidirectional mic - Speak and be heard with complete clarity. Stores away easily and quickly when not in use. System Requirements-PC with built-in 3.5mm audio jacks & 1 USB port and 7.1 Surround Sound-enabled Sound Card (for 7.1 Mode)