... -support SD / USB Card Reader,FM radio,LED display -MP3 decoder,pcb assembly -DC 5.0V, ... IN -power on/off Pcb with LED display(Mini audio board) Function and features:MP3/SD/ ... , volume control, Play/pause, repeatProduct No.: SW-921Technical parameters:FeaturesControl ProvidedLED, digital screenSpecificationsVoltage5VFM frequency range88MHz-108MHzFunctionMP3 player+ M radioAccessoriesRemote ...