http://www.guitar-effects.info/brands/digitech/digitech-rp250-modeling-guitar-processor/ Guitar Effects Info - Details about the latest Distortion, Overdrive, Fuzz, Modulation, Chorus, Flanger, Phaser, Tremolo, Vibrato, Delay, Reverb, EQ, Volume, Wah pedals hourly 1 http://wordpress.org/?v=3.3.1