SE-PEQ is the Parametric Equalizer for Professional players. Unlike Graphic EQ, frequency of Parametric EQ can be controlled very precisely. With controlling width, you can make the image of tone, which makes Pro Musician want to use this. Specs: Frequency Range : 10Hz ~ 20kHz, Gain : -12dB ~ +12dB, Width : 1/2 oct ~ 1/4 oct, Q : 4 ~ 7, Power supply: DC9V, Consumption: 15mA(active), 12mA(bypass), Dimension: 75.5(w) x 115.5(h) x 47.5(d) (mm), Weight: 290g (include battery)