EQ pedals are a really underappreciated way to shape your guitar signal. Highs can be boosted for more articulation in overdrive. Mids frequencies can be boosted to stand out in the mix. Lows can be cut to make things less muddy. It's really endless the amount of tone shaping that can be done, as EQing effects all the other added effects in a chain. The Joyo 6 Band EQ pedal provides a range of ±18dB to help you find your favorite tone. Includes the frequency bands: 100Hz, 200Hz, 300Hz, 400Hz, 800Hz, 1.6MHz and 3.2MHz.