Radio

In Firewatch, you can pick up some Objects to interact with.

Summary
The Radio allows for communication with Delilah. Most of the time, this item is carried with Henry, but sometimes at the beginning of the day it can be found on its charging base inside the Lookout Station.

On Day Seventy Seven, it is replaced with a new radio by Delilah, in an attempt to avoid radio tapping.

In Free Roam, the radio is replaced with the Cassette player found on Day 77, which can be used to play different soundtracks from the game.