SimpleTech STI-PRO/512 ProX High-Speed 512MB CompactFlash Card Allows you to take more images, listen to more MP3s, or store more files One of the fastest cards available, sustained write speeds up to 4MB per second (26X) Guaranteed compatible with thousands of digital cameras, MP3 players and handheld computers Lasts forever with SimpleTech's lifetime guarantee Highest quality assurance rating available - ISO9001 Certified