SanDisk is proud to announce our newest format and capacity to the SD card family: microSD High Capacity (microSDHC) 4GB flash card. This will help and ensure your transition from the microSD format to the microSDHC format for our cards and for compatible host devices. Also comes with a full size SD adapter to fit into devices with an SD slot. Not all devices support microSDHC 4.0GB cards. Please contact your device manufacturer for details. To ensure compatibility, look for the microSDHC logo on the product or packaging of your new phone or PDA.