High quality Pioneer EQ. Alternating Current supply (AC) / 120; 220/240; 110/120-127/220/240 Volt Loudspeaker - For headphones or amp. Material Metal case Model: Stereo Graphic Equalizer GR-555 - Pioneer Corporation; Tokyo Shape Book-shelf unit. Dimensions (WHD) 420 x 105 x 334 mm / 16.5 x 4.1 x 13.1 inch Notes A 7-band Stereo Equalizer with Spectrum Analyzer housed in a metal case. The 7-band equalizer permits boost and cut up to 10dB at 7 frequency bands channel by channel. The 7-band spectrum analyzer monitors the frequency makeup of music, channel by channel. With on/off switches for Equalizer and Analyzer, Tape monitor, with RCA phono sockets for input/output to the Analyzer and Rec/Play for Tape and an AC outlet. Input Sensitivity: 150mV Output Level: 150mV Gain: ± 0dB Frequency response: 10Hz to 50kHz Signal to Noise Ratio: 104dB Total harmonic distortion: 0.03% Control Range: ± 10dB Frequency Bands: 60, 150, 400, 1K, 2.4K, 6K, 15KHz Dimensions: 420 x 105 x 334mm Pictures are part of the description. Carefully insured shipped