Hand adjusted multi-stage MOSFET's with a full complement of controls to deliver tube like tones and exceptional sonic flexibility through a wide variety of amps and speaker cabinets. From Eddie Van Halen's ground breaking early classic tones to the high gain, super articulate sounds he uses today. Output and gain controls set your volume and distortion levels, while the 3 band passive tone stack EQ section shapes your sound to taste. The boost switch kicks the 5150 Overdrive into high gear with extra gain and compression and the Gate control - powered by the Smart Gate circuit - tames unwanted noise. Comes in roadworthy housing emblazoned with custom EVH artwork. True hardwire bypass. Powered by a 9 volt battery or AC adaptor (ECB003).