cell phone holder 1.Read SD , TF , MS , M2 card 2. USB 2.0 , 480mbps 3.phone charger 4.CE & ROHS cell phone holder1.Read SD , TF ... , MS , M2 card 2. USB 2.0 , 480mbps 3.phone charger 4.CE & ROHS ... OS X, and Linux OS* Over-current detection and protection for each downstream port* Plug-and-play and hot swapping functions ...