C-Media CM8738 Chipset PCI-6CH-LX Supports 6 channel DAC output to 51 surround home cinema & games Supports analog inputs Line-in Mic-in Aux CD Supports A3D & DS3D Directsound 3D & EAX Sound Full Duplex Suitable for headphones or speaker set 20 21 40 41 51 Equipped with five audio jacks 3.5cm The APPPCIE51 means that you can convert your PC into a 3D 51 surround system With five audio jacks 3.5cm Jack can connect headphones or sets of speakers 20 21 40 41 51 & through their inputs Front Rear Center & Woofer amplifier You can also connect a microphone to the microphone 35mm input & any audio device to the line input Thanks to its 6 channels can fully enjoy your music & movies like never before Enjoy an unrivaled sound!