... ROHS patent pending2GB available capacitiesUSB HUB 4 port USB HUB1. USB2.0 HUB with 4 port2.High Speed USB2.0, Compliance ... audio-system, display, U disk,etc* CE and Rohs compliance,Ideal for gifts or as promotional itemsabout usShanghai Medfriend Industry ... customer managers and experienced workshop engineers.Our products include compliance aids, patient aids, diagnostic tools, detail aids, patient ...