What does Montag receive from Faber before leaving his house? How will this guide him in conversation with Captain Beatty?

Faber gives Montag a sea shell radio.

"It looks like a Seashell radio."

"And something more! It listens! If you put it in your ear, Montag, I can sit comfortably home, warming my frightened bones, and hear and analyse the firemen's world, find its weaknesses, without danger. I'm the Queen Bee, safe in the hive. You will be the drone, the travelling ear.