... 0 high speed 4 port hub for scanner,digital camera,digital vidicon,audio system,input equipment etc Description:1) Expands four USB port ... supply up to 550mA current per port 2) No external power ... protection circuits 5) Support USB 1.0/1.1, USB2.0, with full speed of 480MBps 6) ... available, thin body,9) Size84x42x15mm USB2.0 high speed 4 port hub(model#PG-USB-Hub231)