One Control Sonic Blue Twanger- Distortion, distortion / amp-in-a-box effects pedal, designed to reproduce the legendary sound of old Fender Blackface amplifiers, Treble control works like the original amplifier EQ, can be used as a preamp, booster or distortion pedal, designed by Bjorn Juhl, true bypass, controls for Treble, Volume, Master, Rhythm/Lead switch on the side to choose between two gain settings, bypass footswitch, status LED, brushed aluminum housing, 6.3 mm mono in / output jacks, power supply via 9V battery or optional 9V DC adapter ( not included), 2.1 x 5.5 mm barrel plug, polarity (-) center (battery is not included in the delivery), current draw 2.5 mA, dimensions (L x W x H) 100 x 47 x 48 mm / 3.93" x 1.85" x 1.89", weight ca. 160 g / 0.35 lbs