Check the listing for details. MXR M101 Phase 90 - Guitar Phaser Pedal. Condition: New. Listed at 99.99 USD. The Phase 90 takes you from subtle, spatial shimmer to all-out high velocity swooshing with the twist of a knob. This pedal can be powered by a 9-volt battery, a Dunlop ECB003 9-volt adapter, or the DC Brick, Iso-Brick, and Mini Iso-Brick power supplies (not included). Buy risk free with our 14 day - full refund, less shipping, return policy. Check out our shop policies for more details. For more than four decades, the MXR Phase 90 has been a mainstay on the pedal boards of millions of players around the globe. This little orange box went on to become the sole icon of its effect category, and countless legendary riffs have benefitted from the sonic qualities of this pedal. No matter the genre or instrument, the Phase 90 has been there through it all to add its distinctly lush voice to a musician's tone palette. With the twist of the Rate knob, you can take the Phase 90's warm modulation from subtle, spatial shimmer to all-out high velocity swooshing.