Sandisk 8GB 8G Class 4 microSD MicroSDHC Card with MicroSDHC to Memory Stick MS Pro Duo Adapter for Sony PSP and Cybershot Cameras with SD Dual Slot Memory card Reader Included Adapter converts the MicroSDHC Memory Card into Memory Stick Pro Duo Card Compatible with PSP and other Sony portable devices that use the MS Pro Duo Cards. (Not compatible with Sony laptops) Speed performance rating: Class 4 (based on SD 2.00 Specification)