The hose shown on the box has a diameter of 4 inches, however the real diameter is closer to 6 inches. Even with a 6 inch diameter, the hose is one way air flow; it isn't split inside, which means it constantly pulls new hot air into the room, whereas a window unit has two separate air loops to avoid this problem (and it is a noticeable problem; it does require a drain pan and hose, which aren't provided). 
Overall, a solid model that has done its job so far.

Except for the screwdriver you'll need to put the window sections together for the outlet to hook into, everything you'll need is provided. 
There are only two settings on the fan, which looks a little lacking. The device is too close to my desk on high to hold a phone call, but it is not loud at all on low. I'd be able to sleep soundly if I had this in my bedroom.