This is a Uni-Vibe type spatial effects unit. Excerpt from Digimart: From Cornerstone, made in Italy, comes a vibe pedal that evolves the Uni Vibe. AQUARIUM was designed with the goal of simplicity of operation, tonal flexibility, and a pedalboard-friendly design, while creating the original beautiful three-dimensional chorus/vibrato tone, solving the drawbacks of Univibe, such as volume drop and high-frequency loss during bypass, as a result of years of research. 100% analog circuit, dual speed control, true bypass switching, board-friendly top-mounted jacks, and operates on center-negative 18V. The analog bulb circuit provides a classic, rich, deep vibe tone. This is an effects unit characterized by a unique, hazy feel, different from phasers, choruses, etc. There are overseas reviews on YouTube, so if you're interested, please watch them and consider purchasing. I purchased it on Mercari and used it, but I am selling it because I no longer use it due to a change in my board. (The previous owner seems to have purchased it new.) As a bonus, I will also include a switch cap! I will wrap it in cushioning material and pack it in a properly sized Amazon box for shipping. Feel free to ask questions or consult with me!