SONY Compact Portable Speaker: SRS-T33 Silver Perfect for your notebook computer or Walkman player, the SRS-T33 is a compact, portable speaker with Mega Bass and One-Box Stereo Sound. Boasting a small design and weighing only 12 ounces with 2 ΓÇ£AAA batteries, the SRS-T33 is ideal if you want to enjoy your music on the road, in the office or at school. The unit is magnetically shielded so it won't interfere with other electronics. Power Supply allows fully portable operation with optional "AAA" x 2 batteries Total Power Output 0.2W provides ample volume for wide-range stereo sound Compact, Lightweight and Foldable Design for easy carrying wherever you take your personal stereo Neodymium Magnets produce great energy output for greater speaker movement, power, and sound accuracy One-Box Stereo Sound maintains separation between speaker cabinets for clear stereo sound Can Also Be Used As Passive Portable Speaker System: with no batteries or external power source required Mega Bass Stereo Sound: produces more powerful bass tones regardless of volume Weighs approximately 8 oz,: 12 oz (including batteries)