LTB HSMT-UD True 5.1 USB Headphone True 5.1 USB Headphone Multiple Speaker Units for Front, Center and Subwoofer New SafeBass Technology Protects Ears by Converging Bass Response USB Connection Plug and Play / Built In Sound Decoder Engine 1.98 Lbs (WxLxH) 6.0" x 7.0" x 2.5"