ammoon EQ-100 Equalizer Effects Pedal Guitar Effect 7-Band EQ Wide Frequency Range This item is an ammoon EQ-100 equalizer effects pedal. Broad range of frequency settings from 100Hz to 6.4KHz. 7 band EQ for precise adjustment. 15 dB boost or cut for each frequency band. Powered via 9V dry battery(battery not included) or 9V AC/DC power adaptor(adaptor not included).