Dual voltage operation; 1.8v for new Sony Ericsson mobile phones, 3.3v for Memory Stick PRO Duo compatible devicesn10MB per seconds read, 3MB per seconds writenCard Dimensions - Length 0.59 x Width 0.49 x Height 0.05nControlled ejection design for easy removal / MagicGate encryption technology support / Includes Memory Stick PRO Duo adapter for universal compatibility