Specifications: - Power supply: 110V(please contact me if you need the 220V) - Sound transmission gain: -1dB or 11dB - Line input impedance: 15K? - Line output impedance: 300? - Frequency response: 20Hz-20kHz - Signal to noise ratio: 82dB - Power consumption: 30W Package Included: - 1 x Set of Audio Equalizer -Dimonstration: 60*10*27cm -Weight: 3.2kg -Volume weight: 4kg