The classic green box of dirt...  chances are one of these makes an appearance on your favourite record, so hey, why not give it a spin on your own stuff too? 

Model: Ibanez TS9 Tube Screamer 
Made: Japan
Serial: 1944544
Type: low gain boost/overdrive
Power: standard (-) 9DCV supply or battery
Mods: none
Accessories: original box
Condition notes: some minor marks and stains on the switch
Overall: exellent condition