Thank you for viewing. This is the tc helicon c1. Studio-grade hardtune/pitch correction effects pedal optimized for vocals. - Features a wide range of pitch correction functions, from natural pitch correction to robot-like hardtune, with manual or guitar input key/scale selection. - Gender knob adjustable for feminine or masculine voices. - Low-noise, high-quality microphone preamp. - Simple 3-knob control. Simple hardtune/pitch correction effects stompbox. I have other items for sale, so please take a look if you'd like.