GOgroove GG-SONAVERSE-TI Full-Range USB Powered 2.0 Channel Computer Speakers for Laptops, Mac, Notebooks, Netbooks, Desktops and More PCs Driver: 1.5 x 2 with passive bass woofer - 3 driver design Frequency Response: 135Hz - 20KHz Impedance: 4 Ohms Dimension: 9.1 x 2.70 x 3.8 in. (each speaker) Weight: 1.8 lbs.