What does Faber give Montag at the end of their conversation?why?
The first conversation that Faber and Montag have is years before they really meet. At the end of that conversation, Faber gives Montag his address on a piece of paper. However, the first real conversation between the two men happens during the book. At that time, Faber gives Montag a communication device that Montag thinks looks like a green bullet.
The first time Faber and Montag meet, they're both at the park. Faber expresses fear and Montag tells him that he hasn't accused him of anything. Faber quickly hides something in his jacket. While the two men talk, Faber tells Montag that he's a retired English professor. He speaks what Montag thinks may be poetry, gives Montag his address, and leaves.
Years later, Montag finds Faber and asks him about how many copies of the Bible are left in the world. He has a part of it that he stole from work. He also asks about Shakespeare and Plato. After he expresses distrust and hangs up, Montag decides to take the book to him. Now believing that Montag can be trusted, Faber gives him the communicator, which Montag thinks looks no larger than a bullet from a .22 caliber pistol. Faber says that with enough of the listening devices/communicators, he can gather information about the firemen and the city without leaving his home.
I assume you are talking about their conversation at Faber's house, not the one in the park. And I'm assuming you are talking about the first conversation at Faber's house. If so, Faber gives Montag the "bullet."
The "bullet" is a two way communicator. With it, Faber can talk to Montag (the bullet will be in Montag's ear) and Faber can hear what Montag is saying.
Faber is giving this to Montag so that Faber can help him out. This way, he can give Montag advice on what to do in certain situations. Specifically, he wants to tell Montag what to say to Beatty.
Faber gives Montag a "green bullet" at the end of their conversation in Fahrenheit 451. It enables Faber to hear Montag and anyone around him, and enables Faber to talk to Montag.
Faber explains that this is his role in changing the society. He believes himself to be cowardly. He is not able to go out and be on the "front lines," so to speak. He says that he can only stay safe at home, and let Montag go out and be at risk. This device enables him to direct Montag from the safety of his home.