|Coby's high-performance 75W 2.1 stereo speaker system gives your computer, iPod(R), Sony PSP(R) or other audio device some real audio punch. Powered by twin 1.5" aluminum cones, the full-range upright satellites produce 20W of output power each. Combined with the 5" driver in the wooden subwoofer, this system is ideal for today's digital audio like MP3 files and game sound effects. Includes inline volume control. Requires audio source with 3.5mm jack, not included.