USB Interface: USB 2.0 certified, backward compatible with USB 1.1 True "plug & play" supports hot swapping function Operating System Supported: Windows 98 / 98SE / ME / XP / 2000 / Vista, Mac OS 8.6 and Linux 2.4.0 or above.Weight 8g approx. Others Power Supply: USB Bus-Powered No external power required Power Consumption: 115mA (max)