In the words of J. Rockett Audio Designs:

The Mr. Moto is everything you wish your amp had built in. The Mr. Moto is a very musical Tremolo with a super lush spring reverb as well. Both can be run independently or together.

The Tremolo can go from a very subtle throb to a choppy rhythmic pulse. Mr. Moto is great for very lush, beautiful tones all the way to full on surf rock. The options are many but no matter where you set it the effect can completely change your tone, feel and the way you approach music altogether.