... reader portable speaker with FM Radio,Alarm Clock and built-in 600mAh battery,SD/MMC ... with SD/MMC/USB,FM Radio and Alarm clockFeatures Simple and stylish appearance, won the German industrial ... battery is low, the top will flash the alarm) Standard mini-usb charging port, is compatible ... with most mobile phone / MP3 MP4 player and USB-powered charging devices Technical Specifications Output Power: ...