Specification: Name: Audio Mixer Maximum input level: Mic input: +22d - Bu / Line input: +20d - Bu Maximum output level: +22d - Bu Main channel level display: 2LED from signal to peak Input channel level: 1 LED peak display Frequency Response Ran: 20Hz to 22KHz 1d - B Common mode ...Specification: Name: Audio Mixer Maximum input level: Mic input: +22d - Bu / Line input: +20d - Bu Maximum output level: +22d - Bu Main channel level display: 2LED from signal to peak Input channel level: 1 LED peak display Frequency Response Ran: 20Hz to 22KHz 1d - B Common mode rejection ratio (MIC 1KHz): >75d - B Total harmonic block loss: 80d - B Noise Figure (rms 22Hz to 22KHz): Equivalent SNR: -122d - Bu / Residual Output Noise: <-88d - Bu Mono/Stereo Input Channel Equalizer: Treble, Broom, 15d - B, 12KHz, Bass, Broom, 15d - B, 80Hz Maximum input power: DC5V/1A 5W Mixer