The Danelectro Cool Cat Overdrive (CO-2) is great addition for a tone thickening, warm overdrive sound. The CO-2 features metal casings, metal jacks, and true bypass. Other features include adjustable volume, tone, and drive knobs to dial in that perfect tone. For those that want to tweak further, Inside the battery compartment there is a trim pot to adjust the input sensitivity to tune the overdrive to your guitar. Also includes a dip switch for AM radio style "lo - fi" tones.