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walkie-talkie
Portable two-way radio used to relay the human voice over short distances.
volume control
Button that controls the loudness of the walkie-talkie.
microphone
Device that converts electric pulses into broadcast or recorded sounds.
push-to-talk switch
When this button is pressed, voice messages can be sent from one extension to another; when it is released, messages can be received.
speaker
Integrated device used to generate sound.
display
Liquid crystal display showing instructions for setting or operating the walkie-talkie.
antenna
Device that emits and receives radio waves.