Based around the Green ringer circuit.
nice octave sounds with ring mod tones.
Great for Paranoid riffs and screaming lead when combined with overdrive.
Sturdy cast aluminium box, true bypass switching.
Here's some code to post a link with image on forums, eBay, websites,...
fx pedal stompbox stomp box guitar effects pedal ringmod ring modulation ring modulator pitch/octave octaver frequency modulation modulate time-based lfo octavers octave 1 octave up octave up higher octave octave higher