Pyle PFA100 30W Class T Hi-Fi Amplifier: * 12V AC/DC adapter * Class-T circuit design * Microphone input jack * Speaker Impedance: 2-8 ohms * 3.5mm iPod/MP3 input jack * Signal to Noise Ratio: >80dB * Total Output Power: 30W * Input Power: DC 9V-14.4V * Frequency Response: 20Hz-20kHz * Short Cut, overload and overheat protection