Spies' Murmur

-Requires Attunement
This headpiece, crafted from dark metal, is worn
curved around the ear.
If you know a creature wearing another spies'
murmur and that creature is within 1 mile of you,
you can communicate telepathically with each
other. As a bonus action, you can allow that
creature to hear everything you hear for 1 hour.
You can end this effect as a bonus action, and it
ends if you're incapacitated.