FLAMMA FV04 Harmony Vocal Processor Effects Pedal with 11 Different Harmony Modes - Walmart.com
Guitar Pedal X - GPX Blog - Electro-Harmonix's Intelligent Harmony Machine delivers a Neater and Smarter Harmonizer with Classic Pitchfork style Pitch-Shifting onboard too
6 Best Harmonizer Pedals In 2022 (Budget, Polyphonic, High-End & More)