Behringer BEQ700 Ultimate 7-Band Bass Graphic Equalizer Shape your sound and eliminate feedback with 7 bands of equalization This BEHRINGER product has been designed to compete head to head with leading products on the market Wide frequency range from 50 Hz to 10 kHz with a powerful 15 dB boost/cut per band Status LED for effect on/off and battery check Runs on 9 V battery or the BEHRINGER PSU-SB DC power supply (not included)