Amazon.com: FLAMMA FV03 Vocal Effects Pedal Voice Changing Sounds Like Robot Male Female Baby with Delay Reverb Effects for Polishing Up Vocals Includes Guitar Input with Optional Guitar Reverb Effects : Musical
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
BOSS VE-1 Vocal Echo Voice Effects Pedal | Guitar Center
TC-Helicon VoiceTone T1 Vocal Tone and Dynamics Effects Pedal | Sweetwater
Boss VE-500 Vocal Performer Effects Pedal | Sweetwater