Is your band a Hi-Band, or a Lo-Band? Time to take the Hi-road. This sounds great: it shifts the delayed signal up an octave, so it's got a more shimmery, crisp tone than a standard flanger. It's been modded to run on a normal 9v power, which is handy. 

Model: HF-2 Hi Band Flanger
Made: Japan; December, 1985
Serial: 610200
Type: modulation: flanger
Power: standard 9v negative tip adaptor or 9v battery, not included
Mods: modded to run on standard 9v power supply instead of 12v AC 
Accessories: none

Condition notes: used, no major marks. Tested and fully functional.
Overall: excellent condition (9/10)