1.USB HUB 2. Professional manufacturer 3.LED light Indication 4.USB 2.0version 5.compliance withCE,ROSH. USB HUB 1. USB2.0 ... HUB with 4 port,every port can roll over2.Support ... , audio-system, display, U disk,5. Single chip integrated USB HUB controller with embedded proprietary processor6. 4 ports, and power up ...