YAMAHA COD-100 OVER DRIVE This listing is for the main unit only. It is old and has not been tested due to the lack of a testing environment, so it is being sold as junk and as-is. Please purchase with the understanding that it may not work. There is no guarantee of power-up, sound output, or the operation of knobs and switches. The exterior shows signs of aging, such as scratches, rust, and dirt. Please purchase only if you fully understand the condition.