The Velazquez Engineering PRO class pedals are fully hydraulic sim racing pedals ready for plug-and-play operation. The PRO pedals feature the Tilton 600 series floor mounted pedal assembly which is one of the most popular pedal assemblies used in real race cars! All of the hydraulics are handled by high quality Wilwood master and slave cylinders. The pedals connect directly to the PC via a USB connection. The pedals are calibrated via the Windows USB Gaming Controller calibration wizard or via DiView. No special software required!