... a mp3, it is mp4, it is card reader, it is a digital ablum, it is also a audio speakerProduct ... productsLoudspeakers, such as PC, Nb, MP3 player, Mobile etc.Digital time,Calendar and clock functionsCard readerMaximum supports 16GBAlarm clock functionProvide ... displayInput interface: USB interface(USB-A-Full-speed) Micro SD card memory card slot, 3.5mm headphone output/input interfaceMusic format: MP3, ...