This is a pretty straight forward waterproof vibrator. What caught my attention about the Shane's world pledge party is that it has 4 different "heads" on it. They fit a lot like a chap-stick top on the tip of the vibrator. Without the heads, it has 3 little metal knobs on the tip. The heads are all textured differently; they are rounded and smooth, 4 bumps (looks like a lego), 12 pointed bumps (sharp) and a bunch of different sized pointed bumps (also sharp). The vibrations are pretty strong; it will get the job done, but I don't personally like vibrations that are too strong. It's a twist to start design with one speed and it is REALLY LOUD. This is not good for a roommate situation at all. I put it under a pillow in my room and could hear it in the living room through closed doors. This vibrator uses 3 watch batteries, there are 8 included. The packaging says 4 batteries, but only 3 fit in mine.