Powered Mini-Subwoofer 3-Pc Multimedia Speakers Magnetically shielded / 3'' Subwoofer / 2 x 2.5'' Drive (Per Satellite) Subwoofer Frequency Response: 20Hz - 20KHz / 580 WATTS (PMPO)* / Power On/Off Button Volume Control Knob / Power Input:120V AC 60Hz / Subwoofer: 5 x 4.25 x 6 inches (L x W x H) Satellite Speakers: 4.75 x 2.75 x 6.25 inches (L x W x H)