Viking CF64M-P 64 MB CompactFlash Card Optimized for use in PDAs, MP3 players, or digital cameras Write speed guaranteed to exceed 1.2 MB per second (8X) with independent test results exceeding 2.25 MB per second (15X) High quality components guarantee steady performance, the utmost durability, and breadth of compatibility Individually tested to ensure each product works the first time, everytime Five year replacement warranty and 30-day money-back guarantee