The Round USB Hub is fully compliant with USB Specification version 2.0  

No power adapter required-operates on bus-power mode,

Fully plug-and-play compatible with Windows 98/98SE/ME/2000/XP and MacOs 8.5 and higher.

Supports up to 4 USB devices simultaneously

Support high and low speed USB devices

Up to a maximum 480 Mbps Data Transfer Rate in USB 2.0 High-Speed Mode

LED Operation Indicator