Amazon.com: BOSS VE-2 Vocal Echo Pedal for Singing Guitarists | Real-Time Vocal Harmonies and Effects | Create Harmonies with Manual Key Selection | Connect Guitar for Auto Harmony Function | 24 Harmony
The Best Harmonizer Pedals to Turn Your Guitar & Vocals Into a Lush Choir
STAX 1 Stax Guitar Harmonizer Pedal Digital Effect Pedal Harmony Pitch Shifter Detune For Electric Guitar Bass Mini Size True Bypass