This is a vintage Ken Multi DE 1200 Digital Delay rack unit sold for parts or repair. It switches on and lights up. I have had my guitar go into the input and out to my amp and the sound passes through it but the digital delay doesn't work. If you know what you are doing you might be able to get it going. I haven't tried to so it's an unknown, hence I am selling as seen/described for parts with no return. Any questions please feel free to ask.