Very good effect for its price (Made in Vietnam). Heavier than it needs to be, but ...! It runs on a battery (9 volts) with a low current consumption (20 mA). Be careful with the GAIN, SENSITIVITY(second distortion) & TONE settings, they are very sensitive and you need to find your "sweet spots". In my case, I needed to add TS9DX to achieve the tone I like. You experiment! Good luck!