Echo Skull

You can see, hear, and speak through a tiny dried animal
skull at any distance. As long as you and the skull remain on
the same plane, you can see and hear as if you were standing
where it is, and during your turn you can switch your
perception from its location to your own or back again as a
free action.
At higher levels. For each spell level above 4th, the
duration of the spell is doubled.