Ok,i 've got it :D! Now,i know why they call it the "Mini Deja-Vibe"... :) It's surprisingly small & compact!It's a really beautiful pedal!There was no power supply,so,i used a regular 9VBoss PSA transformer.I only tried it 10-15 min. at low volume but i'm already very pleased by the sound !I used it in front of the amp but,when i set the MDV's volume too high ,i can hear radio interferences...very vintage :( I will try in the loop tomorrow and see how it goes...