tc electronic Polytune 3 Mini; Effects Pedal for Electric Guitar; compact polyphonic tuner/buffer, tuner in effectpedal size, Bonafide buffer circuitry preserves your tone through long cable runs and multiple effects, polyphonic tuning - tune all strings simultaneously, fast chromatic tuner offers 0.5 cent accuracy, ultra-precise strobe tuner gives you ±0.02 cent accuracy, "always on" tuning mode keeps tuner on and detecting even when not muted, automatic brightness adapting Ssper-bright 109-LED display, automatically switches between polyphonic and monophonic tuning; LED: Effect On; Footswitches: On/Off/Mute; Connections: Input (1/4" Jack), Output (1/4" Jack), PSU Input (5.5 x 2.1 mm Barrel Connector, center negative); Current Draw: 100 mA; powered by a 9 V DC Power Supply (not included); suitable optional Power Supply: item no. #409939; no Battery operation; True Bypass; Dimensions (W x D x H): 51 x 45 x 93 mm (2,01" x 1,77" x 3,66"); Weight: 160 g (0,35 lbs); Color: white; Made in Denmark