Manufacturer's Description The SDHC memory card is a highly secure stamp-sized flash memory card, which can be used in a variety of digital products: digital music players, cellular phones, handheld PCs (HPCs), digital cameras, digital video camcorders, smart phones, car navigation systems and electronic books, that follows the SD 2.00 specifications. The SDHC card has a security feature for protection of copyrighted data. Product Description SanDisk is proud to announce our newest format and capacity to the SD card family: SD High Capacity (SDHC) 4GB flash card. Please note this is an SDHC card. Not all devices support SDHC 4.0GB cards. To ensure compatibility, look for the SDHC Logo on the product or packaging of your new camera or digital camcorder, or contact your device manufacturer for details. Click here for more information on compatibility. We suggest using the following card reader with these SDHC cards (click here).