... MP3 Speaker; Active Mobile Phone Speaker; Mini Stereo Speaker; SD Speaker;ultra-low noise digital effects ... :Mini MP3 Mobile Cell Phone Stereo Speaker with SD Slot. With this Mini Stereo Speaker, you can enjoy the ... equipped with ON/OFF/AUX switch, 3.5mm PHONE jack, 3.5mm audio cable, Vol- button, vol+ button ... , play/pause button, SD slot, and DC 5V jack. Turn the power on, the front LED lamp will ...