Customizable Digital Media Player. Plays MP3 files stored on standard CompactFlash™ memory cards. Files are arranged as speech tracks in up to 127 languages, and/or as music tracks in up to 127 playlists. Any audio track or playlist can be triggered by either a discrete signal input or by a GPS position from an external GPS receiver. Audio tracks, titles, triggers, setup information, software updates and even translated system prompts are all stored on the CompactFlash™ card. Card is prepared using AI's exclusive CardPrep software (runs under Windows). Plays up to 16 hours of stereo, CD-quality audio per card, depending on the size card used. Operates on 12-30 Volts DC.