Thank you for viewing. This item was purchased used from a recycle shop. There is almost no crackling, and the operation is good. All inputs and outputs work without problems. There are scratches and scuffs. Please refer to the photos. In my subjective opinion, I used it quite a bit as a preamp for clean to crunch sounds, inserting it into the amp's return (mainly using DRIVE MODE, which is said to simulate Fender amps). The high-gain sound feels dated, but it might be suitable for those who want to create sounds from the late 80s to the early 90s. There is no manual, but it is available on Roland's HP, so please download it from there if you need it. There are no included accessories. Please understand that this is a used item before purchasing. Thank you. Manufacturer...BOSS