The "BOSS OC-2" adds thickness to your sound by adding two tones, one octave below and two octaves below the original sound. Each tone has independent volume control, reproducing a very clear tone. [Condition] There is some wear and tear, but there are no operational issues. [Adjustment Details] Overall cleaning *This item is also sold in our store and on other sites. We try to update as quickly as possible, but please forgive us if it sells out. *All included accessories are shown in the photos. ■All Products →#ENCORES_Encores ■Effectors →#ENCORES_Encores_Effectors 2400110012272