Octpus guitar pedal with 44.1K 24bit sampling,32 bit true floating point DSP,with storage of timbre sound. | Precise polyphonic octave effects with no distorted sound, with 11 different octave modes. | 3 way toggle switch select between different modes : TOP, BOTTOM and BOTH . TOP Mode provides a very high end octave effect; BOTTOM mode gives a very low octave sound and the BOTH option conbines the two. Oct1 controls the first OCT volume. Oct2 controls the second OCT volume. | Solid Aluminum-alloy classic, stable and strong, small size for easy carry. | High quality product guaranteed, and 60days refund warranty.