I was looking to purchase a ABY box. I ended up getting this looper pedal. It was my mistake but the web site sells both and lists both as ABY boxes. The product does not have any description or instructions. The 3 time that I tried to contact the seller, I didn't get any useful answers. Now for the product. The looker switch is well built. It has a input for a 9 volts power supplier but I have learned through trial and error - this is only used for the LEDs. The switch works fine without power. Playing around and experimenting with the switch, I learned you can make it work like an A/B switch but not a Y switch. So in summary the product is good, the shipping was fast, be sure of which pedal you purchase and be prepared to figure out the rest on your own.
No instructions on plug ins