TUNES2GO GA11080 Portable PA System and Guitar Amplifier Max Power is 300W (75 RMS) and 1 inch Tweeter @ 50Watts SD card and USB Flash drive reader input slots (supports up to 16GB) for each slot One XLR Microphone/Instrument Input, one 1/4 inch Instrument Input, one RCA Input and one 1/4 inch Instrument output One Auxiliary Input (3.5mm), Master Volume & two Gain Controls Power Supply -120V or battery power up to 16 Hours