Enjoy amazing stereo sound from your MP3 player or iPod with the Hype HY-519-SK-BLK Portable Stereo Mini AMP Speaker. The HY-519-SK-BLK looks like a mini guitar amplifier with individual treble and bass controls so you can customize the sound output and a 3.5 mm audio jack for easy connection to your favorite music player. It runs on three AA batteries (not included) or can be powered by your computer's USB port. Compact and portable, the HY-519-SK-BLK is easy to carry anywhere you go. Listen to your favorite tunes with this Hype HY-519-SK-BLK Portable Stereo Mini AMP Speaker!