Pyle 30 Watts Class T Hi-Fi Stereo Amplifier W/ Ac Adapter Included. "Power Output 20 x 2 Watts Class T Circuit Design 12v, 2A Ac/Dc Adapter 3.5mm iPod/Mp3 Input Jack Microphone Input Jack Can Use For Car and Home Short Cut, Overload, Overheat Protection Dimensions: 6.02'' x 4.96'' x 1.5''