USB or battery-powered speaker system...

Features:

- Frequency Response : 20Hz - 20KHz.

- Speakers : 76mm Diameter.

- Impedance: 4Ohms.

- Cord plug : Stereo 3.5mm.

- Output Power : 0.8W x 2.

- The speakers can be powered in three ways: using batteries,
  via your PC's USB port or via mains power (adaptor not included).

- A jack to jack cable and jack to USB cable is included.

- 500 times the size of standard headphones.

- Requires Batteries (not included)

- iPod not included.