Indeed it does come with a manual, however there really isn't much in there as is the case with most mods. Sadly lacking in information, but really can't fault them for not having the joules info, that is something I think users are expected to know, henceforce my inquiry here to all the far more knowledgeable folks than myself.
Aside from the sparse information in the manual, I can absolutely say the 5 is a fantastic mod. I have the 4s and let me tell you, the fit and finish is far above that of the 4s, the functionality is flawless. I am glad I ordered 3 of them for my collection.
You won't be disappointed. What color did you order?