... the USB,SD,MMC card with MP3,MP4,Mobile,FM 3.frequency87.5-117MHZ. plastic rechargeable of USB Mini Speaker 1 ... clock/LCD/FM 2.Good sound and wooden material mini 3.mini speaker plastic rechargeable of USB Mini SpeakerWelcome to visit ... .5-117KHzLoud Speaker:2inch; 4ΩSignal and noise ratio:≥80dBOutput: 3.7V800mAInput: 5.0VFeature and Function:1) Support MP3/Mobile/Computer ...