The SanDisk 32GB MicroSDHC Class 4 card gives you amazingly quick transfer rates from your phone to your PC and back again. These are the ideal companion for multimedia phones because they plug right inside the phone providing immediate expansion of memory storage. Compatible with MicroSDHC host devices; not compatible with standard MicroSD-enabled device/readers. When combined with the adapter, can be used as a full-size SDHC card.