The APPPCIE51 allows you to convert your PC into a 3D 5.1 surround system. With five audio jacks 3.5 mm Jack can connect headphones or sets of speakers 2.0, 2.1, 4.0, 4.1, 5.1 and through their inputs Front, Rear, Center and Woofer amplifier. You can also connect a microphone to the microphone 3.5mm input and any audio device to the line input.