Features MP3 Playback - The Pa amplifier has Usb input. Store your tracks in the thumb drive and start playing from the amp.Digital Display - The bright display in the power amp let you see the important settings. It let you monitor the amp easily.Safety Feature - The Amplificador has overheat and short circuit protections. The large fan dissipate the heat very efficiently.Multipurpose - The stereo receiver can be used for public address, karaoke, Dj, speeches, placed of worship and home parties.Amplifier Specification:Power Source- Ac 220-240V 50/60HzCar Battery- Dc-12VPower Output- 40W Rms Max, 35W Rms at 10% Thd, 30W Rms at 5% THDOutput Regulation- >84dB@20Hz to 20kHz at Maximum OutputInput/Sensitivities- 3xMic 0.60mV/4.7k , 1xAUX 125mV/470k Frequency Response- 550Hz-18,000hz 3dbTone Controls- Bass: 8db at 100Hz, Treble: 8db at 10kHzSignal to Noise Ratio- 60dbOutput- 125mV/470 Speaker Output- 4 , 8 , 16