ProHT Computer Speakers (88152), 2.1 Stereo System Multimedia Speakers with Subwoofer and Volume Adjustment Knob, Black SUBWOOFER - with a 3-inch subwoofer and bass control at your fingertips, this subwoofer delivers booming bass that is pleasantly surprising. SATELLITES - 2 satellites speakers deliver crisp, clean high notes and warm mid-range, working in perfect harmony with the subwoofer. 2.5-inch high efficiency drivers and an angled satellite face create the optimum listening experience for even the most demanding audio junkies. VOLUME ADJUSTMENT - The separate control pod turns the speakers on and off, adjusts master volume, On-speaker volume and bass dials give you instant command over your listening experience. POWERFUL SOUND - 2.1 speaker system is perfect for movie watching, music listening, and gaming. Surround yourself in audio, immerse yourself in the experience. COMPATIBILITY- works with Computers, music players, TVs, DVD players, iPods and other audio sources with 3.5 mm. 100% quality guarantee.