This pedal is a very robust synth pedal with tons of options. I'm assuming if you are looking at this listing, you know what you are looking it. Otherwise go look for a YouTube video on it - you'll learn more there than from me plugging in some dumb AI description. It is pretty advanced and known to be a bit of a challenge to dial in, but the sounds it is capable of are pretty amazing. I bought it almost exclusively for the arpeggiator, and that mode is indeed what I used most often. It tracks great and is really fun. The pedal is in very good condition. It comes with the original box as well as the "alt function overlay" transparency, seen in the photos. It has "loop" side velcro on on the back. If you are one of those weirdos who puts loop side on your board, I can't help you. (That's a joke- you aren't a weirdo. But you will have to remove the tape yourself.)