It can also come with this attachment that can be separate or directly bolt on to the whole frame structure. I built this a few years ago as an experiment of growing my own food inside my apartment and as a nice little escape during winter time since walking into it with the high intensity grow lights to do gardening felt like a nice escape into summertime and it helped my mood. I only did it once and because I could not perfect my gardening dynamic I decided to stop using it. I put a lot of time forethought and work into making this so that it's very light and at the same time strong and sturdy, and it's easy to disconnect the different pieces for customization and transportation. I got the price this low because it's the only way to sell things on OfferUp and I just don't have the room for it, even with it taken apart. I also made it very easy to know which pieces connect to which and it only requires a few screws in each and the screws are already in the pieces. This price doesn't even reflect how much it cost for the materials to make it. In addition to that the biggest cost was time and forethought with planning. You also get the quiet ventilation fan which is high flow (I replaced the bearings in it to make it even quieter). You can also have one of the timers and multiplug adapters and an aluminum ventilation duct that connects onto the ventilation fan. Some uses aside from growing plants in it in apartments or house are using it to paint inside of and control the air quality or even to give your child his or her own room and a house where a kid wants his or her own room. The entire setup is very clean and I do not smoke so it does not stink. It is disassembled and ready for purchase and transport. Enjoy my hard work. Oh and here are the dimensions in inches: Outside measurements- 69 3/4 by 71, height measurement 81 3/4. Inside measurements- 66 1/2 by 68, inside height 80 tall . Almost forgot to mention that the measurement on the side with the self extension that has the filtration fan is a horizontal length outside measurement of 81 1/4 inch (which is past the 71 inch measurements on the other side because of extending out.