high quality usb mini speaker. 1.used for computer,pc,mp3,mp4 etc 2.USB cable power 3.good stereo sound 4.aluminum body Feature:Available USB portWindows98SE,ME,2000,XP or higher Mac OSX or hight3D sound technology with 2.0 channel,USB plug for power rich bassMini and portableSpecification:Power output:3Wx2(RSM)RF:90Hz-20KHzS/N Radio:≥80DbImpedance:4ΩPower:DC 5V