A Phaser Pedal Sounds like you're about to be Teleported to another world.
It's a mixture of a Flanger & a Chorus Pedal, originally developed to recreate the sound of a Rotating Horn inside a Leslie Cabinet.
It didn't quite turn out that way but we were left with a excuse for Eddie Van Halen to make another Album.
It is now a studio & stage sample with many musicians utilising phase pedals in a vast array of different applications.
Compare prices for New & Used Phaser Pedals below.
Vintage MU TRON PHASOR Analog Guitar Pedal Phaser Phase Shifter by MUSITRONICS
TC Electronic Helix Phaser Pedal NM229
Rare Retro Mu Tron Phasor II Phaser Effects Pedal Phase Shifter Guitar
MXR M107 Phase 100 Phaser Guitar Effects Pedal
Analogman MXR Orange Handwired 1974 Vintage Phase 90 Phaser Pedal CSP 026
New Fender Lost Highway Phaser Guitar Pedal
Blackout Effectors Sibling Analog Phaser Pedal Sister to Whetstone
Vintage MU TRON PHASOR Phase Shifter MUSITRONICS Guitar Pedal Analog Phaser
HBE Homebrew Electronics Psilocybe Phaser Pedal W 2 Cables