tc electronic Mimiq Mini, effects pedal, doubler, compact authentic doubling pedal with responsive tightness control for realistic voice doubling, creates illusion of more than one guitar playing at once,  controls: Effect - Tightness - Dry, footswitches: On/Off, True Bypass, powered by a 9VDC power supply, (barrel type connector - centre negative, not included), suitable optional power supply, dimensions (W x D x H): 51 x 93 x 45 mm, (2,01 x 3,66 x 1,77 inches), weight: 210 g (0,46 lbs)