EarthQuaker Devices' own version of the classic optical vibe circuit, it has been optimized to work well with all types of instrument, pickup and saturations. With its Voice and Throb controls, it can achieve sounds from thin and subtle to warm and deep. The Intensity and Rate will go from a smooth, ultra-slow warble all the way to speedy, sharp bursts allowing you to get more than just the classic vibe sounds. The Level will allow you to boost the signal well above unity to make up for any perceived volume loss commonly found in vibe pedals. It can be powered by 9V for warmer tones or by 18V for a stiffer tone with more headroom and sparkle. All analog, true bypass and handmade in the USA. Version 2 features the new Flexi-switch for latching or momentary operation, as well as a silent relay-based switching for silent operation and longer life.