This is a Logic 3 Stereo speaker system, quite unique as it splits for better stereo sound. This has a 3.5mm Jack plug for connection to the speaker socket of the source. This requires a DC 5v 1A adaptor as a power source. Folded size is 17x9x3 cms so ideal for travelling. Suits early phones with a 3.5mm speaker socket and also ipods. NOTE phone and Ipod in pictures are for demo purposes only.