Terabyte USB 2.0 Multimedia speaker system. TB-008T. Output power: 3WX2 (THD 10 percent), impedance: 4 Ohms, connector: 3.5mm connector, power supply: DC 5V, Dimensions: 170 x 98 x 95 mm. Accompany speaker for PC, MP3, MP4 and Notebook, mellow and clear timbre, built- in active amplifier, pure and elegant sound quality with unsurpassed effect, in compliance with acoustics and aestetics rationale, flexible sound with distinct tone levels, small sized design, easy to take. Last image is explanatory.