Features:100% brand new and unused4 band eq with lcd tunerInput impendence:10ohmFrequence responsce:20HZ-20KHZControl Range:ass: +-12dB at80HZMidd: +- 12dB at 800KHZTreble: +- 12dB at3KHZPhase reverse switchBlanded and unblanced output jackPower supply(9v battery not inlcuded)size:95mm(L)x 55mm (W)Package included:1setx NEW 4 Band Guitar EQ Slim Type Acoustic Guitar Pre-amp W/Transducer Piezo-840