Joyo R-13 XVI Octave PedalXVI is a practical and user friendly Octave pedal. With independent Octave up and Octave down adjusting knobs, so you can adjust as you like. Moreover, it features MOD effects exquisitely designed by JOYOs engineers, compared with similar products from the rivals, XVI offers much richer tone. Specs: Dimensions : 109mm x 67mm x 48mm Weight : 248g Input Impedance : 2. 2 M Output Impedance : 100 Rated current : 90mA