Creative A220 is a set of amplified stereo speakers and a subwoofer. The speakers are designed to be used with FCC/CE certified computer equipment. The speakers have a power output of 2 watts RMS per channel for the satellite speakers and 5 watts RMS for the subwoofer. The speakers have a signal-to-noise ratio of 75dB and a frequency response of 40Hz to 20kHz. The speakers come with a variety of cables to connect them to your computer and other devices. All cables used to connect to the computer and peripherals must be shielded and grounded. The speakers are easy to set up and use. Simply connect the speakers to your computer or other audio source, and then plug the speakers into a power outlet.