... portable Multimedia Speakers for PC, Laptop, MP4, MP3 and other audio device.2.With the power button and volume control knob ... for business gift5.Only one control cable with built in sound card driver and amplifer circuit needed, easy to operate6.Support for ... desktop, MP3, MP4, tape recorders, learning machines, radios and other audio device 7.Simple & fashion design, easy to assemble and disassemble ...