Lepy LP-2024A+ Hi-Fi Audio Amplifier Stereo Power Amplifier Car Amplifier with Power Supply, 3A Power, 20W x 2 RMS, Black With universal audio input port for connecting with MP3, MP4, Mobile Phone, Tablet PC or DVD, etc. Convenient speaker output spring terminals. Output power: 20Wx2RMS. Input power: DC12V-13.5V, 3A. Frequency response: 20Hz-20 kHz. THD: 0.4%. SNR: 80db. Input impedance: 47k ohms. Input sensitivity: 200mV. Dimension: approx. 14x9.2x3.9cm/5.5x3.6x1.5in.