1.Compatible with MP3, MP4, iPod, Computer, CD player 2.It is very portable 3.Good quality, ... jack, such as MP3, MP4, iPod, Computer, CD player.2) Metal grilles protect your speakers while traveling.3) Quad micro-driver design ... Power: 3W*2; Impedence: 4ohms6) Cord Plug: stereo 3.5mm computer speaker usb speaker Gift speaker mobile speaker mini bomb box speaker