The SPA2210R loudspeakers from Philips are powered by USB. The SPA2210R 2" satellitespeakers include a bass boost systemgiving you powerful sound for music, games andfilms. Compatible with PC and Mac.General:Product Type : PC multimedia speakersSpeaker System:System Components : 2 speakersSpeaker Type : ActiveAudio Amplifier : IntegratedConnectivity Technology : WiredControls : VolumeAdditional Features : USB poweredSpeaker System Details:Speakers Included : 2 x right/left channel speaker - wiredDriver Details : Right/left channel speaker : 1 x full-range driver - 2"Miscellaneous:Cables Included : Audio cable - 1.5 m