The standout feature on the ICD-MX20DR9 is the hybrid storage. It gives you the Option of using the built-in 32MB Flash Memory or utilizing Memory Stick{R} Duo / Pro Duo media cards for virtually unlimited capacity. This is a great feature for those that don't have time to Download files to a computer. Just put in a new Memory Stick{R} Pro Duo media card, and keep recording. Each card can hold over 300 personalized folders to organize your audio. It's compatible with Dragon Naturally Speaking Preferred Voice to Print Software and USB 2.0. Box Contents: Recorder, PC download software, Dragon Naturally Speaking software, 2x AAA batteries, USB cable, carrying case, Stereo earphones and documentation Weight: 3.39 ounces