Handy little OD based on the Boss BD-2. Does the job nicely. 

Model: Mooer Blues Crab 
Made: China, recent model
Type: overdrive
Power: standard 9v negative supply (not included)
Switching: true bypass
Equivalent new street price (approx): $135aud
Mods: none
Accessories: no box or manual
Condition notes: used, few little marks, very good condition