A simple, one-knob nano-sized effects pedal that offers a variety of reverb settings, including Kill Dry. I've owned this pedal for over 10 years because I love the design, but I'm selling it now that I've bought an amp with reverb. I think it's a great pedal, and it's easy to see why it's so popular. There are no operational issues. It's in excellent condition as it has never been used live. - Model Name: Holy Grail - Type: Reverb Effects Pedal - Size: Nano Size - Country of Manufacture: USA - Controls: Spring, Hall, Flerb, Reverb Thank you for looking.