The ROD81 is an effects unit that combines overdrive and distortion, with adjustable sound quality. Features a vacuum tube. - Model Name: ROD81 - Type: Overdrive/Distortion - Controls: GAIN, BASS, MIDDLE, TREBLE, MASTER, BOOST, EFFECT - Color: Silver - Connections: Input jack, Output jack - Condition: Shows signs of use - Scratches: Scratches on the side Both the booster and distortion have been tested and confirmed to be working. Includes a Maxon genuine adapter DC 10 V 200 mA It runs on 10 V, but it also works fine with 9 V, and while the difference in sound is subtle, it might come down to personal preference. The power adapter has no issues with the terminals themselves, but it is in poor condition. Thank you for viewing.