ULTRA VIBRATO UV300 Kicking the ULTRA VIBRATO UV300 into action is like putting an invisible, automatic whammy bar on your guitar. From the gentle, pulsing rhythms of the ocean surf, to the wild, whirling effects of a rotating speaker system, the UV300 will bring a dose of days-gone- by to your sound. Altered State Select from Unlatch, Bypass or Latch modes and twist the dedicated Rise, Rate and Depth dials to create your ideal vibrato. In Latch mode, the effect is constantly on once you step on it. Unlatch mode only applies the effect while you press down on the pedal, so you can add vibrato to a single note if you like. Your guitar will be playing mind-games with everyone in earshot as familiar, but hardly ordinary, tones of the 1960s and ‘70s ooze out of your amp. Power Options The blazingly-bright amber LED tells you when the ULTRA VIBRATO UV300 is activated, and the first-class on/off switch maintains peerless signal integrity in bypass mode. You can power the UV300 with a 9 V battery or our PSU-SB DC power supply (not included).