ACP-EP Memory USBPD/4GB-2.0 4GB USB 2.0 Mobile Vault/Privacy Flash Drive Password protect critical files with AES 256 bit Software Encryption Backup and restore function USB 2.0 High Speed Interface (USB 1.1 Compatible) True Plug-and-Play connection for hot swap function LED indicates when drive is in use Portable Vault software compatible with Windows 2000 (SP4), XP Home / Pro (SP1, SP2)