Fahrenheit 451
what device does faber give montag so they can communicate?
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Faber gives Montag a small, green, bullet-shaped two-way radio of his own invention, similar to the seashell radios Millie is so fond of. They plan to communicate through the radio, and thus, from the safety of his own home, Faber will hear all Montag does and provide suggestions for how to act.
http://www.gradesaver.com/fahrenheit-451/study-guide/section2/