The "Super Flash" USB Medical Flash Drive is more than just a flash drive. One end holds a concealed medical data sheet that lists detailed emergency information that is needed when a computer is not accessible. On the other end is a whistle that can be heard three blocks away. N-Style ID has provided a template already loaded on this 1GB USB Medical Flash Drive for your medical information. You may edit and view this information by opening a text file editor program such as Notepad (Windows) or TextEdit (Mac OS X). This will be your medical information file, to adjust to your specific needs. You may go back and change your information at any time. This USB Medical Flash Drive device can also be used to store x-ray images, PDF documents, or any other digital media that may aid emergency personnel in the event of a medical emergency. The "Super Flash" may be engraved on the outside with urgent information that can be viewed instantly. When ordering with a Medical ID Bracelet or Medical Necklace, you may wish to engrave "See Flash Drive" on the ID of your chosen Medical Jewelry. Flash drive measures 3 1/4" by 5/8".