A-DATA PD2 4GB USB 2.0 Flash Drive Support USB specification version 2.0. Support Driver for Windows 98/98 SE. Driverless solution for Linux Kernel version 2.4 or later version. Driverless for Mac OS 9.X or above. Support Windows ME, 2000 and XP without device driver. No external power is required. It also supports software application for Disk Security and Disk Partition. Support power saving mode to reduce power consumption. Hot Plug and Play. LED indicator when device is in use.