Maxon's 00s-era update on the classic 808. Which, they invented. It's got all that articulate snap and chime, but with a fatter, smoother voice and plenty of gain range. Absolutely one of the best takes on the genre I've come across. 

Model: Maxon OD-820 OverDrive Pro 
Made: Japan, 2000 approx
Serial: sticker partially removed
Type: overdrive
Power Input: standard 9v DC centre-negative supply or 9v battery (not included)
Accessories: none

Condition notes: used, no major marks. Tested and fully functional.
Overall: very good condition (8/10)