Guitar effects unit. one control for speed parameters. footswitch for bypass function. Mono I/O 6.3 mm. Battery operation possible. Operation via 9V power supply possible (not included). Phaser effects unit from MXRWith the MXR Wylde Audio Phase, MXR celebrates 20 years of successful collaboration with ZakkWylde. The Phaser is an essential building block in Zakk's sound shaping and enriches the guitar tone with its special assertiveness. With the intuitive 1-control operation, the "sweet spot" is quickly found. Thanks to the option of battery power, the setup can also be operated independently of a power socket.