F-PEDALS PhazeVibe Lite Electric Guitar Single Effect Uses Standard 9V DC Supply (Center Negative) Purely Analog 3 Selectable Modes FeaturingKiller Phaser,Uni-Vibe, Wah-Wah Vibe, Quasi-Leslie Emulationsand More 3 Controls (Level, Tone, Speed)with Easy-to-Read Position Indicator Compact Size - 3.6*2.0*1.5 in / 9.2*5.2*3.8 cm