Every vault dweller gets his pipboy on his 10th birthday. Pipboy’s are powered by fission cells and never run out of power.
Having a pipboy provides the following benefits:
1) You always have a map of where you’re been and how to get back
2) You have a constant read out of your current heath and radiation exposure
3) You can have up to +2 reference books on hand. (i.e. two +1 or one +2)
4) The pipboy picks up local radio broadcasts
5) Built-in flashlight