ASUS Xonar Phoebus ROG Gaming Soundcard Set Sound Cards ROG Command Technology effectively reduces up to 50% of environmental noise Embrace exceptional sound quality for the win with 118dB SNR clarity and headphone amplifier Control box within easy reach for instant volume tuning and headset connections Enjoy effortless adjustment with new Xonar Audio Center Realistic surround and enhanced sound thanks to Dolby Home Theater V4 and the GX3.0 game audio engine