The Integral 4GB micro SD memory card is about a quarter of the size of an SD card and is the newest standard of SD flash memory specifically designed for use with ultra-small mobile phones and other devices. Like the mini SD, the micro SD/TransFlash is ideal for use in storing media-rich files such as music, videos, and photographs in compatible mobile phones.

The Integral 4GB Micro SD card is a high capacity Micro SD card and is also known as a Micro-SDHC.
These cards are only compatible with the very latest mobile devices (check manual with hardware/phone for compatability)
Micro-SDHC is compatible with the latest phones such as:
Nokia N95/E90/6110/6267/6290/6500
HTC Touch, Palm Treo 680
Blackberry Pearl, Blackberry 8800, Curve 8300

Advanced Features:

• Class 4 SDHC Speed Rating read/write 4MB/s
• Comes bundled with an SDHC Adapter for use with SDHC compatible devices
• Built-in security features enable users to download, store, and play secure content just like an SD card.