I-docking digital speaker Portable for mobile & notebook FM optional,SD/USB Built-in chargeable battery has docking license ... ,SD/USBBuilt-in chargeable battery,Portable FM PLL radio/AUX-IN input * Universal DOCKING SPEAKER STATION * FM digital tuner* USB audio and SD ... control I-Docking Digital Speaker for Iphone Ipod Notebook with FM (SD card ,USB)