The BOSS PH-3 Phase Shifter Pedal is jam-packed with vintage and modern phasing effects, including Rise and Fall modes for unique, unidirectional phasing. Syncing these phasing effects is as simple as tapping the BOSS PH-3 pedal to tempo. Includes classic multistage phasers with selectable stages. BOSS gives you a 5-year warranty with the PH-3 Phase Shifter pedal.