This sounds awesome. The D&S II runs on a pair of op-amps with germanium clipping diodes, so it sounds similar to the classic 808, but with more low end heft and gain range. It's perfect for punchy, warm blues leads or choppy rhythm parts. 

Model: Maxon D&S II Distortion & Sustainer
Made: Japan, recent model (serial 09XDT013)
Type: distortion, mid-high gain
Power: standard 9v negative supply
Switching: buffered bypass
Equivalent new street price (approx): n/a
Mods: none
Accessories: original box and manual
Condition notes: used, no major marks. Overall: excellent condition