Digitrax DCC PR3 USB 2.0 Programmer for Digitrax "Sound" Files/Decoders - Includes> PR3, USB Cable, PS14, & User Manual... Product Information: Multifunction USB 2.0 PC connectivity for your railroad! Digitrax "SoundLoader" compatible. Programs Digitrax sound projects to SFX decoders. Programs CV"s for most DCC decoders. LocoNet MS100 mode with Fully Buffered Input and Output data. Runs on Windows XP, Vista and 2000. Runs on Mac OS 10.4/10.5 with JMRI. Automatic configuration. No jumpers or switches required. Configurations can be set by software or manually. Selectable LocoNet termination. For standalone operation without needing a Command Station. LED state indicator lights. Small, convenient size. Firmware updates available from Digitrax Web site. Meets FCC Class B requirements. Digitrax PR3 Programmer Comes With: PR3. Instruction sheet. USB Cable. PS14 Power Supply. User Manual. In addition, you"ll need: A Computer running Windows/MAC OS with SoundLoader or equivalent program running. An isolated programming track section (You won"t need a "power booster" to increase programming track voltage.)