I purchased this about 5 years ago and used it for a few months before storing it in its box. I have confirmed that it works. There is no instruction manual. It comes with two replacement activated carbon filters. I will pack it as shown in the fourth picture (wrapping the top and bottom with styrofoam). There is also a part shown in the fifth picture, but I don't know where it goes. It works without it. Please set it up as shown in the sixth picture. I may need to attach packing tape directly to the outer box for shipping. Please be aware of this beforehand. I am selling many pet supplies, so please take a look at my other items too (^^)