The battery compartment is located at the base, which pops open easily. It doesn't tell you which way the 2 AA batteries go; but, after a bit of experimenting, I discovered the batteries go with the positive side facing the tip. This toy is NOT waterproof. The push-button is easy to use, though it clicks a bit loud when depressed. 3 levels of vibes, which, for my personal tastes, were medium, slightly more, then a medium-high. Not as strong as I usually prefer, but I DO like them STRONG. The vibe was very quiet, especially for being made of hard plastic. Nothing rattled where it shouldn't. The vibes were the strongest at the tip, which is exactly what you're looking for in a clit stimulator. This toy is a bit odd to use by yourself, since it is so long. I have long arms, and it was a bit uncomfortable using by myself.