Electro Harmonix WORM, Effect Pedal, Fully analogue multi-effects processor with phaser, tremolo, vibrato and a neo-modulated wah, At the heart of The Worm is a specially designed sound modulator that creates oscillating effects, Controls: Rate, Range, Manual switch: Auto/Manual Exp, Mode, LED: Effect On/Off, Foot switch: Effect bypass, Connections: Input (6.3 mm jack), output (6.3 mm jack), expression pedal input (6.3 mm stereo jack), power supply connector (coaxial jack 5.5 x 2.1 mm - positive pole inside), Power supply via 24 V DC power supply unit (included), True bypass, Dimensions (W x D x H): 102 x 121 x 57 mm@+*Note:* Battery operation not possible.