... 3.LED light Indication 4.USB 2.0version 5.compliance withCE,ROSH. 4 Port USB HUB1. USB2.0 HUB ... 5/12/480Mbps3. Supports up to 127 USB devices4. Extensively compatible with scanner, digital camera, digital vidicon, audio-system, display, ... U disk,5. 4 ports, and power up to 500mA each port6. USB bus ... 2000/xp/vista,Mac OS9.1 or higher Mini 4 Port USB HUB