Stereo sound and built-in microphone， standard 40mm Hi-fi speaker unit that ensures the great sound quality. Soft cushion head-pad and ear-pad， create more force bearing， reduce the weight of headset for wearing comfort， suitable for long-time wearing forprofessional gamers. like CS， DOTA2， music， movie or conversation， etc. Especially made for games. Features:Professional 7.1 surround sound USB gaming headphone for PC/Laptop. Hidden microphones， space-saving and more efficient. Colorful LED lights are designed on the earcups， making it look more fashionable and stunning.Flexible microphone for exact positioning， and mic with great sensitivity at picking up sounds.Delivers clear sound and Deep Bass for Real GameSoft cushion head-pad and ear-pad， as well as adjustable length guarantees hours of gaming comfort. Eliminate sweat heat， skin-friendly earmuffs. Supports WINDOWS XP，VISTA，WIN7.Specifications:Brand: BOAS Model:BQ-9700Type: HeadphoneConnection: USB 2.0Speaker Diameter: 40mm Impedance: 32 Ohm ± 15%Frequency Range: 20Hz-20KHzMax Input Power: 100mW Sensitivity: -45db+3dbCable length: Approx.2mHeadphone Size: Approx.9 * 7.5 * 7cm/ 3.54 * 2.95 * 2.76inHeadphone Weight: Approx.240g/ 8.48ozPackage Size: Approx.24 * 9 * 8cm/ 9.45 * 3.54 * 3.15in Package Weight: Approx.364g/ 12.84oz Package List:1 * Headphone