The JF-06 Vintage Phase pedal is a modern replica of the pedal that made Eddie Van Halens sound! The divebombs and swirling buzz of his custom electric guitars, ran through those high-gain amps cranked to 11 just wouldnt have been the same without a Phaser on select tunes. Probably one of the best, most musical effects a lead guitar can employ for sound creation. There are probably still new tones to be achieved. The JF-06 from Joyo features true bypass wiring, and only one simple control know, marked Speed this controls the rate at which the phaser cycles its pulses. The thing can go from underwater to subtle beauty and depth in a matter of a 1/16 note. Purchase two if you have several songs where you want to use different (pre-established) rates. The price is so there, it actually makes this possible.