Authentic and classic three dimensional phase shifting! There are dedicated Rate control and separate Tone switch for fine-tuning of effects speed and tone. A status LED for effect On/Off and battery check is included, plus there is a true hard-wire bypass for ultimate signal integrity. No matter what phasing effect sound you re after, VP1 is bound to make getting there easier! The VP1 runs on a 9 V battery or a DC power supply (not included).