Kingston Micro SD(SDHC) 4GB card.
This is a class 4 card.
Starting at 4GB, microSDHC cards offer higher storage for more music, more videos, more pictures, more games --- more of everything you need in todays mobile world. The microSDHC card allows you to maximize todays revolutionary mobile devices. Kingstons microSDHC cards use the new speed class rating of Class 4 that guarantee a minimum data transfer rate of 4MB/sec. for optimum performance with devices that use microSDHC.
Identical in physical size to todays standard microSD card, the microSDHC cards are designed to comply with SD Specification Version 2.00 and are only recognized by microSDHC host devices. To ensure compatibility, look for the microSDHC or SDHC logo on host devices (e.g. phones, PDAs, and cameras).