The GEB-7 is a seven-band equalizer created specifically for the frequency range of the electric bass. Since the frequency range extends down to 50Hz, the GEB-7 is also great for adjusting depth and bottom end of an upright bass with pickups. 50Hz to 10kHz frequency range specifically designed for bass Full range response, even for five- and six-string basses Can be used as a "boost" or "cut" pedal using the level control knob Great for eletric-acoustic bass applications AC adaptor or 9V battery operation BOSS 5-year warranty