Horn of voices

A horn of voices was a magical horn that projected sound over a very large area.

Powers
The horn projected any sound applied to it, such as its user's voice, so that it could be heard everywhere within a radius of. There was no need for the user to shout, and the projected sound had the same volume for both nearby and faraway listeners.

There was no command word to activate or deactivate a horn of voices, so it also amplified nearby sounds even if not in use, basically making it impossible for anyone to approach an area withour being heard. This unwelcome side effect could be avoided by placing the horn in an airtight container.

History
Horns of voices were common to all cultures in Coliar, which used the items to communicate over large areas. They were typically used during the election process of the aarakocra community leaders throughout the planet. The candidates would use the horns to state their merits for their entire communities. The population then voted for the leader, who would hold the position for the next seven years.

It was possible to acquire horns of voices outside of Coliar, but they were considerably more expensive.