The Mint Green Mini Vibe is designed to give an organ type of vibrato similar in sound to early electronic organs and some tube amplifiers with true vibrato.
Björn describes the 2021 model: "This is the latest upgrade that uses extended speed range aligned to most wanted use and adjusted frequency response for more seethrough response.".
It is designed to sound quiet different from that obtained from phase shifters and the Uni-Vibe, in that it will have less phase distortion, and different from vibrato obtained from certain chorus pedals, in that it is not a comb-filter which tends to give a metal quality to sound.
There is a classical sound to be caught - rarely before obtainable with a guitar, in a portable format, driven from a 9 Volt battery or a 9V power supply.