... 2.Volume Control 3.Earphone port 4.It's also your MP3,U-Disk Stereo speakersound boxspeaker box ... SD/MMC Port Earphone Slot Volumn Control/ ... (Single) Selling Point*Connect to your iPod,iPohe,MP3, MP4, Laptop, PC, MD, Mobile Games,etc ... ’ performance*With SD/MMC Card Port;*With Earphone Port*With Volume Control,Led indicator Package Information ...