Boss XS-100 Poly Shifter Pitch Pedal with Natural Tone Advanced AlgorithmsThe XS 100 Poly Shifter redefines pedal based pitch shifting with groundbreaking BOSS technology years in the making. Delivering natural sound, precision tracking, and deep customization options, this powerhouse expression machine transforms how you perform with pitch. Glide up or down four full octaves with the ultra smooth pedal to infuse your music with evocative new colors. Enhance solos by triggering bold shifts with a single footswitch press.