All of our items are Brand New Audio Brilliant: compensates the details and clarity of compressed audio data Dynamic Bass: increases the bass reproduction capability of headphone Smart Volume: Normalizes sound levels of different audio contents Voice Clarity: Improves clarity of received voice from VoIP application Multi-function keys support microphone-mute, speaker-mute, volume-down, former-song, next-song and stop/start PC gaming details in vivid sound effects and directional sensation Expanded music listening for rich and spatial enjoyment Surround sound for immersed theater experiences VoIP chatting without worrying about the noise around VoClear ENC dual omni-mic close-talk voice capturing technology USB spec. 2.0 full-speed compatible and USB-IF certification USB audio device class spec. 1.0 compliant USB HID device class spec. 1.1 compliant User Friendly and Customizable UI Programmable GPIO for Hardware Controlled Surround and ENC Switches and LED supports for Windows 98SE/ ME/ 2000/ XP / Vista/ WIN7/ Win8/ Server/ MacOS 10 or higher. Brand No Brand SKU 100024565_NP-1019403673