Pioneer DJ DJM-S9 Battle Mixer MAGVEL FADER PRO Pioneers durable magnetic crossfader delivers a smooth response Customizable FX Buttons.Software system requirements : Windows 8.1/7(CPU) Core i3, i5 or i7 1.07 GHz, (Memory) 4GB Filter FX. Rotate the dial to add a high/low pass filter to FX on each channel, or use Serato DJ to switch to other filter FX like DUB Echo, Noise and Pitch. Style Levers. Quickly turn effects on and off using the 2 large Style Levers. Trigger FX briefly, lock them on, or exit arrangements quickly. 2 Built-In USB Soundcards