MONO Amplifier *Power Supply: 110-127V/220-240V AC * With ECHO,TONE,REPEAT. Power Supply: 110-127V/220-240V ACOutput Speaker: 4 Ω, 8 Ω,16 Ω 70V 100VPower Output: Rated:50W, Max: 55WRMS Output: 55WFrequency Response: 20Hz~20KHz Harmonic Distortion: 1%Three unbalanced 6.3mm jack inputs MIC sensitivityControls: 8 Volume Controls, TONE, ECHO, REPEAT