Each of these identical silver rings is inscribed with the Draconic word for friendship.

When you activate a ring of communication, for the next minute you can clearly hear any words spoken by anyone within 1 mile who is wearing another ring of communication to which you are attuned. The volume of the speech and the background noise at either end make no difference; whispers are audible above even the sounds of combat.
Any two or more ring wearers need only touch their rings together (a standard action) and speak the command word in unison to attune the rings to each other. Any number of rings can become attuned to one another in this manner, so long as all are touched together at the same time.
A ring remains attuned to the others until you attune it to a different ring.

Prerequisites: Forge Ring, detect thoughts.
Cost to Create: 1,000 gp, 80 XP, 2 days.