I purchased this new in the mid 70's. It works great and can be used to phase any instrument or even vocals. It has an a/c plug, so no batteries are needed.

This vintage Mu-Tron Phasor II guitar effect pedal is a must-have for any guitar enthusiast. Made in the United States in the 1970s, this analog phaser is the perfect addition to any electric guitar setup. The Mu-Tron brand is known for its high-quality and durable products, and this phaser is no exception.

With its unique sound and classic design, this pedal has become a staple in the pedal boards of guitarists around the world. Whether you're a collector or a musician, this Mu-Tron Phasor II is a valuable addition to any collection.