FEATURES- Extreme III SDHC Card with Reader- 4GB (4096 MB)
       Serious professional photographers who demand one of the fastest, 
        most rugged, and most durable memory cards on the market should 
        choose the SanDisk Extreme III SD card. Built to work under the 
        most challenging conditions, with SanDisk Extreme III you'll get 
        more speed, better performance, and unmatched reliability. 
       That's because only SanDisk Extreme III memory cards feature 
        innovative ESP Technology for the fastest speeds and highest 
        performance. ESP stands for "Enhanced Super-Parallel Processing". 
        Simply put, it means you are getting the fastest read/write speeds 
        available -- an amazing minimum 20MB per second sequential read and 
        write speed -- speed you'll definitely appreciate whenever you find 
        yourself shooting and storing pictures in harsh environments, 
        extreme temperatures or at high altitudes. 
       Every SanDisk Extreme III SD card comes with RescuePRO so you can 
        recover images, documents, mail, video, music -- just about any 
        digital file, with ease. Built with leading-edge media recovery 
        algorithms, RescuePRO lets you preview recoverable data before you 
        try to retrieve it. With RescuePro's unique recovery algorithm for 
        MPEG audio and MPEG video recovery (MPEG-1/2/3) what you see, and 
        what you hear, is what you can recover. 
       SanDisk Extreme III expands its award-winning, professional line of 
        memory cards with a new 4GB SDHC (Secured Digital High Capacity) 
        card.  The SanDisk Extreme III 4GB SDHC memory card offers speed, 
        performance and reliability to ensure you get your photos every 
        time. A 4GB memory card can store more than 2,000 high-resolution 
        pictures or up to 8 hours of MPEG 4 video.  As an added bonus, the 
        card is packaged with a bonus SanDisk MicroMate--a $20 value -- so 
        that users have a one-stop shop solution for capturing, storing and 
        transferring their images. 
* What is SDHC?
   To support the higher capacity needs, SD cards are now requiring a 
   different design. The new SD 2.0 specifications which supports 4GB and 
   up, is called Secure Digital High Capacity (SDHC). The SD Association 
   has created and defined 3 speed classes to help you identify speed and 
   performance capabilities/minimum requirements of SDHC cards and their 
   SDHC host products. Details on the SD 2.0 specification: 
   http://www.sdcard.org or SanDisk.com/SDHC
   Cards address data (read and write) at numerous speeds. Many factors 
   impede this performance. SDHC guarantees a minimum read and write speed 
   necessary to handle recording high quality video and audio. The maximum 
   card speed may vary, but you can always depend on SDHC cards to meet 
   your SDHC host product's high quality performance requirements. 
* SDHC Compatibility Information
   Because SDHC works differently (supports the new higher capacity cards) 
   this new card format is not backwards compatible with legacy SD format 
   host devices. 
   The SDA speed class rating was developed to identify minimum data 
   transfer and latency requirements for a host application and provide a 
   means for consumers to match those requirements with an appropriately 
   rated SD card.  For example, in the emerging application of real-time 
   video capture (camcorders, camera phones etc), in order to ensure smooth 
   capture and playback of video, the camera buffer RAM must never 
   experience a data over-run or under-run.  This requires that the card 
   communicate certain parameters to the camera and then meet some minimum 
   governing parameters.  An SDA speed class rating of 6 means that the 
   card will be able to transfer (with specifically defined latencies and 
   data allocation units) data in a random fashion without interruption.  
   Consumers should look at the intended host device to select the correct 
   speed class rating in the card they buy.  Since speed class 6 is 
   currently the highest rating defined by SDA, it doesn't necessarily mean 
   that a speed class 6 is the fastest card that a consumer can buy for all 
   applications.
   By contrast, SanDisk's minimum performance rating of, for example, 
   20MB/sec on Extreme III cards states the performance level that those 
   cards will deliver for sequential write and read operations in non-real-
   time applications such as file transfers between a card and a computer 
   or in digital cameras between the camera's buffer and the card.  In this 
   case, the statement of performance allows customers to make a relative 
   comparison between cards of differing performance and price points.  
   SanDisk Extreme III cards are also speed class 6 rated.

SanDisk Extreme III 4GB SD Memory card with MicroMate USB card reader