Used only at home, and I don't smoke or have any pets. I think it's in good condition as I've only used it 4 or 5 times since I bought it. Manufacturer's description: This is the final form of overdrive, incorporating the "glossy" sound of the early TS-808 and the sound of a driven vacuum tube amplifier! By using valuable VINTAGE parts, it produces a more "glossy" sound, and is an overdrive that makes single notes extend comfortably. The bypass sound is buffer specification. The power source is a 9V battery, which can be replaced by removing the back cover of the main unit. Note: Use a 9V power adapter with a center-negative specification and a stabilized circuit. Center-positive will cause damage.