The Boss GT-6 Guitar Effects Processor gives you 30 amp models, plus COSM distortion/overdrive/wah pedal modeling. Includes effects such as Uni-V and De-Fretter, plus superb 24-bit sound quality. 340 effects programs give it more versatility than any pedal in its class and a customize function allows you to create your own tonal wrinkles. 15 analog-style knobs for editing commonly used parameters and an EZ Tone feature for quickly creating custom patches based on 30 templates. Uses built-in expression and control pedals to alter effects in real time.