MXR M279 Deep Phase, phaser effects pedal, expressive vintage phaser tones with fast and easy tweakability, dynamic, voice-like response to attack, FDBK knob adjusts phaser intensity, standard mode runs on 4 phase shifter stages for a smooth effect, Mode II switch selects 8 phase shifter stages for twice the number of peaks and a more animated texture, pedalboard-friendly MXR mini housing, true bypass, controls for Speed, FDBK (Feedback), Mode II switch, bypass footswitch, status LEDs, metal housing, 6.3 mm mono in / output jacks, power supply via optional 9V DC adapter, 2.1 x 5.5 mm barrel plug, polarity (-) center, battery operation not supported, current draw 20 mA, dimensions (L x W x H) 90 mm x 40 mm x 55 mm, weight ca. 300 g