Mini Speaker 1`can connect to Mobil phone, computer, laptop 2 ... music of USB, SD card 3`pure sound, fashion design Mini SpeakerDetailed information Output RMS 5W*2 Frequency 100HZ---18KHZ Speaker ... can interface to computer, mobile phone, notebook computer, PSP, MP3/MP4 player, ect.3`It have a handle for people carry it ... interesting in more speaker product, please call me any time. Mini Speaker RX-20