Surfy Industries SurfyTrem Tremolo Guitar Effect Pedal — Truetone Music
Electro-Harmonix Worm Analog Wah/Phaser/Vibrato/Tremolo Pedal
Guitar Pedal X - GPX Blog - ThorpyFX takes the 4-Stage Phaser to the Next Level with its Superbly Innovative Pulse Doppler Analog Multi-Mode Phase-Shifter, Vibrato, and Pulsating Tremolo Pedal