The MXR Phase 90 Guitar Effects Pedal is a classic analogue shifter and phaser pedal designed for use with acoustic electric guitars, electric guitars, and bass guitars. Made by the renowned brand MXR, this model is known for its warm and gritty tone, perfect for creating a wide range of vintage-inspired effects. Ideal for musicians looking to add some character and depth to their sound, the Phase 90 is a versatile pedal that can be used for both live performances and studio recordings.