Brand SADES Model SA-902 Wireless Type Wired Color Black + red Material Plastic + PU leather + nylon + aluminum alloy Interface Type USB length 300 M Impedance 32 ohm Sensitivity 111 +/- 3 dB Headphone Frequency Response 20~20000 Hz Features With microphone Microphone Dimension: 6.0 x 5.0cm; Sensitivity: -54dB +/-3dB; Directivity: Omnidirectional; Impedance: <= 2.2K ohm; Driver Diameter: 40mm; Ergonomic design for comfortable wear; 7.1 USB sound card delivers thrilling surround sound with separately adjustable levels; Ultra comfortable headband and ear cushions guarantees hours of gaming comfort; Reinforced headband perfect fit; High-precision sound source position and super shocking sound effects; Variable Bass Boost enhances the reality and depth of explosions gun blasts and other deep sounds; High sensitivity microphone and microphone mute; Small home theater effects in 7.1 surround sound; 7.1 simulated sound channels; With volume control for both chatting and gaming sound; Keypad function: Volume +/- mute and power on/off; A single USB connection provides power Warranty 6 months Packing List 1 x Headphones 2 x Stickers 1 x Software CD 1 x Warranty card 1 x Chinese user manual CD Content: http://m2.img.dxcdn.com/CDDriver/sku.172329.rar