ART Macro Mix, 4-Channel Mixer, Signal-to-noise ratio: > 90 dB, Maximum gain: +40 dB, Input impedance: 10 kOhm, 4 Unbalanced line inputs, Dual mono-summed RCA inputs, Headphone-/Line output, 12V DC Power supply included, Dimensions: 143 x 92 x 45 mm, Weight: 725 g