Philips SPA35A/94 Notebook USB Speakers (Blue)

This system has 3W RMS total output power. RMS refers to Root Mean Square which is a typical measurement of audio power or rather, the electrical power transferred from an audio amplifier to a loudspeaker, which is measured in watts. The amount of electrical power delivered to the loudspeaker and its sensitivity determines the sound power that is generated. The higher the wattage, the better the sound power emitted by the speaker.