Everyone loves a good octave, until now we have had our OCHO monophonic pedal which allowed 2 octaves down, both add some meat to any solo, or to make a big riff sound even bigger. However, while often sounding awesome in the right context, the monophonic analog octave effects are only good for single monophonic notes.
https://www.joyoaudio.co.uk/joyo-xvi-polyphonic-octave-guitar-effect-pedal