I stored this item in a closet after purchasing it new and discarding the original box. Although I've lost the instruction manual, the operation is not difficult. It is an unused item, but I tested its operation by inserting a single sheet of paper before listing it. As shown in the 10th photo, there were no problems with the operation. The reverse rotation also worked without any issues. There is some dirt, but no yellowing. It is equipped with an "input slot shutter" to prevent accidents and an "auto-off function" to protect the motor. The input slot is sized to accept A4 paper from the short side. It's easy to pull out the shredded material, and disposing of the waste is effortless. Thank you.