The PR3 Xtra lets SoundFX users download new project sound files and even reflash the sound decoder{s firmware for the latest updates. It also acts as a computer interface and LocoNet translator for your PC. The PR3 Xtra has all the functionality of the PR2 and MS100 combined. PR3 Xtra uses the USB 2.0 interface comes with a PS14 power supply. :Multifunction USB?2.0 PC?connectivity :Digitrax SoundLoader compatible. Programs Digitrax sound projects into SFX?decoders :Programs CVs for most DCC decoders :LocoNet MS100 mode with fully buffered input and output data :Runs on Windows XP, Vista, 2000, 7, and 8 :Runs on Mac OS with JMRI :No external power needed for MS100 mode : For stand alone programming mode the supplied external power supply is required :Automatic configuration. No jumpers or switches required. Configurations can be set by software or manually :Selectable LocoNet termination for stand alone operation without a command station :LED status indicator lights :Small, convenient package :Meets FCC?Class B requirements