LogiLink 2.1 Speaker System. RMS rated power: 9 W, Peak Music Power Output (PMPO): 180 W, Frequency range: 20 - 20000 Hz. Speaker interface type: 3.5 mm. AC adapter output voltage: 220 V. Type: Portable speakers, Audio output channels: 2.1, Satellite speaker driver size: 57.1 mm (2.25 ")