Check the listing for details. Catalinbread Perseus Sub-Octave Modulation Analog Fuzz Pedal Open Box Used. Condition: Open box. Listed at 145.00 USD. For sale I have a sub-octave analog fuzz guitar effect pedal from Catalinbread . This needs an external power supply, takes no batteries and already has Velcro attached on the back. I rarely use fuzz in my effects chain and therefore have no real need for this one but it is fun to play with but not essential for my tone. It’s in great condition considering it’s rare usage and has been kept in the box for the past year so it time for it to find a new home. Great for playing desert rock/doom/stoner metal for example. Toggle switch adjusts from one to two octaves below the played notes. This is a neat effect but I’m not into the type of fuzz sound it generates so hopefully this one can be enjoyed by someone who incorporates fuzz into their effects and will appreciate it that much more. This does not come with external power supply. Ships within 1-2 days of receipt of payment. Thank you for looking.