SpinTrack Arcade USB spinner by RetroArcade.us, perfect for MAME systems with silver knob Features: Uses Tornado-style Spinner Tops, the best available anywhere.; Two modes of operation:; Can be used as a lightweight Super High Resolution Low-Inertia Trackwheel control as used in "Arkanoid"; Can also be used as a spinner with the addition of one of two sizes of fly-weight to provide inertia giving long spin-times of up to 20 seconds.; Correctly-designed flywheels with mass concentrated at the larger radius.; Ultra-high resolution. Unbeatable 1200 pulses per revolution..; Super-tough quality. Unit is manufactured by a supplier of encoders for high-speed motor usage and is almost identical to their industrial unit. ; Dual sealed ball-bearing races give the ultimate in smooth control.; One-Piece bearing housing/body CNC machined from a solid alloy billet; Available in two versions, for direct connection to USB, or for connection to our Opti-PAC or Mini-PAC interfaces.; In USB mode, this is the worlds only USB 2.0 spinner. USB 2.0 enables a 16-bit interface and a faster packet-rate than USB 1.1 Vital to avoid slowdown or backspin.; Usage not limited to gaming! Also suitable for precision control applications, CNC interfacing and other rotary measurement applications.For Opti-PAC connection, the 4-pin connector fitted to the device must be cut off and the wires stripped back. They are connected as follows: Brown - +5 Volts Yellow - X1 Green - X2 White - Ground; Warranty: 90 Day DOA exchange warranty only Installation of this product requires professional electronic experience , use at your own risk.UPC: 665570203437 SP: Jamma60-in-1 PCB, iCade, Arcade Multigame, Arcade Spinner, SpinTrak, Arcade controller, Robotron spinner, Rotary Control, Rotary Spinner, mame spinner, jamma spinner