SanDisk SDMSM2Y-8192-A11M 8GB M2 Mobile Ultra Memory Stick (Black) Dual voltage operation; 1.8v for new Sony Ericsson mobile phones, 3.3v for Memory Stick PRO Duo compatible devices 10MB per seconds read, 3MB per seconds write Card Dimensions - Length 0.59? x Width 0.49? x Height 0.05?