Amplifier configuration:Analog Amplifier, Amplifier SNR:≥80dB, Amplifier output power:16W + 6W x 2, Total Harmonic Distortion + Noise:≤1%, Frequency range:45HZ~20KHZ, Line input impedance:≥20KΩ, Input Interface:3.5 Stereo plug, Output Interface:RCA Direct Connect Speaker. Great Versatility for MP3 Music with CD, MMc and USB Slot.