This is hands down the wildest flanger pedal I've ever played around with. It does some more trad flanger sounds, but if you turn up the 'manual' and 'feedback' controls, it basically tips into self oscillation and generates a big rolling pitch all it's own as well as messing with the input signal. The power input is proper vintage so bank on using a battery. Extremely cool!

Model: Yamaha FL-01 Flanger
Made: Japan, 1982 approx
Type: flanger
Power: vintage six pin power supply or 9v battery (not included)
Switching: buffered bypass
Equivalent new street price (approx): n/a
Mods: none
Accessories: no box or manual
Condition notes: used, few minor marks, fully functional. Overall: good condition