Verbatim - 4GB microSDHC Class4

Currently the smallest form factor of memory card available, the microSDHC memory cards are designed especially for mobile phones, this tiny memory card consumes very little power, therefore preserving the battery life of your mobile phone. It can also be used in GPS devices, MP3 players, digital cameras and PDAs.
SD High Capacity (SDHC) is the SD memory card based on the SDA 2.0 specification and larger than 2GB capacity. Benefits include, larger capacity and higher data transfer speed. The Speed Class Specification classifies performance by Class number and offers the method to calculate its performance.