Given that it only uses one battery, I was quite surprised at the power of this gadget. And they’re not kidding about the lipstick — externally, it looks like an unremarkable tube of lipstick that you have to uncap to get to the “incognito” lipstick vibrator. Easily tossed in your purse to use anywhere. A really great product that I’ve recommended to all my girlfriends. Everyone who’s bought one agrees that this is a rare must-have.