Pyle Home PD750A Professional PA Amplifier with Built-In DVD/CD/MP3/USB/70-Volt output With USB Port, DVD Player (Anti-Shock) Compatibility with DVD/CD/CD-R/CD-RW/MP3 Output Regulation: Less than 2dB no Load to Full Load Speaker Output: 4 Ohm(20V) 8 Ohm(28.3V) 16 Ohm(40V) 70V Line Out: 1V0.3V Frequency Response: 20Hz a 20Khz Harmonic Distortion: 1% S/N Rotie:75dB 2 Mic Input with Volume Control 1 AUX Input with Volume Control DVD/AUX Volume Control 700 Watts Tone Controls:  10dB at 100Hz Treble 10dB at 10KHz Indicator: LED Output Level Master AC Power Supply: 110-127/220-240 AC 50/60 Hz DC Power Supply: 12V or 24V Battery Sold as : Unit With USB Port, DVD Player (Anti-Shock) - Harmonic Distortion: 1% - 700 Watts Compatibility with DVD/CD/CD-R/CD-RW/MP3 - S/N Rotie:&#8804;75dB - Tone Controls:  10dB at 100Hz Treble 10dB at 10KHz Output Regulation: Less than 2dB no Load to Full Load - 2 Mic Input with Volume Control - Indicator: LED Output Level Master Speaker Output: 4 Ohm(20V) 8 Ohm(28.3V) 16 Ohm(40V) 70V Line Out: 1V0.3V - 1 AUX Input with Volume Control - AC Power Supply: 110-127/220-240 AC 50/60 Hz Frequency Response: 20Hz a 20Khz - DVD/AUX Volume Control - DC Power Supply: 12V or 24V Battery