The used CALINE CP-31 graphic EQ pedal is in great condition, offering 7-band equalization ranging from 100Hz to 6.4kHz for precise tone shaping. Perfect for guitarists seeking to fine-tune their sound, it features true bypass for minimal tone loss, intuitive sliders, and sturdy metal construction. This compact pedal runs on a standard 9V power supply and is ideal for both live performance and studio setups.