Caline CP-24 10-Band EQ Equalizer True Bypass Guitar Effect Pedal with Aluminium Alloy 10-Band equalizer professional guitar pedal. Includes the frequency bands: 31.25Hz, 62.5Hz, 125Hz, 250Hz, 500Hz, 1KHz, 2KHzand, 4KHz, 8KHz and 16KHz. True bypass design minimizes tone loss. Sturdy aluminum alloy case. Comes with 4 protective caps to protect petal.